Scientific evidence classification · Phase 6A preserved + Phase 6B additions
PWWP Compounds
& Bioactivity
Explore experimentally studied preparations separately from deposited research ligands, buffers, ions and unresolved chemical evidence. Every role is source- and target-context specific.
Combined Phase 6A + Phase 6B denominators. These groups overlap; the 109 structurally source-tagged research ligands are unchanged. Deposited components and reagents are not automatically biochemical binders.
Phase 6B · source-reviewed additions (separate from the Phase 6A snapshot)
0 matching new observations · 0 preparations
Keep source-level IC50, Kd, and whole-protein DC50 separate; these records were not included in the original 80.
| Preparation | Target scope | Original assay | Primary source |
|---|---|---|---|
| No Phase 6B additions match the selected observation-level filters. This does not erase existing Phase 6A observations. | |||
Evidence classification · exact source records
75 matching profiles
7 matching assay / association observations. Counts here are profiles, not unique assay events or deposited ligand instances; views overlap.
| Preparation | Tested target & construct | Method / endpoint | Original observation | Conditions & uncertainty | Source & verification |
|---|---|---|---|---|---|
| BPPPREP:BPP | HDGFL2 PWWP1 1–93Variant: Y18SHomo sapiens |
KdNMR chemical-shift perturbation Kddirect binding affinity | = 0.29 ± 0.02 mM290 µM · exact unit conversion | Experimental context
|
PMID:39031937 · 2024Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrievedOriginal observation record{
"assay_construct_end": 93,
"assay_construct_start": 1,
"assay_context": "purified_mutant_domain",
"assay_organism": "Homo sapiens",
"assay_record_id": "PWWP5:ASSAY:0028",
"assay_type": "NMR chemical-shift perturbation Kd",
"assay_value_transferred_to_modeled_stereoisomers": false,
"ccd_id": null,
"chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
"compound_name": "BPP",
"conditions": {
"binding_model": "1:1 global fit of perturbed residues",
"buffer": "HEPES-buffered saline; CSP subsection does not separately give HEPES/NaCl concentrations",
"ligand_protein_molar_ratio_range": [
0,
6
],
"pH": 7.4,
"protein_concentration_mM": 0.1,
"target_variant": "Y18S"
},
"domain": "PWWP1",
"domain_id": "UP:Q7Z4V5:PWWP1",
"endpoint": "Kd",
"evidence_class": "direct_binding_affinity",
"evidence_location": "Results; Figure 3D",
"evidence_url": "https://febs.onlinelibrary.wiley.com/doi/full/10.1002/1873-3468.14981",
"gene": "HDGFL2",
"inclusion_rationale": "Primary source explicitly identifies this preparation, target context and observation.",
"is_negative": false,
"numeric_transcription_status": "source_preserved",
"numeric_value_inferred_from_structure": false,
"pH": 7.4,
"pdb_id": null,
"preparation_id": "PREP:BPP",
"protein_id": "UP:Q7Z4V5",
"publication_year": 2024,
"reference_id": "PMID:39031937",
"remaining_uncertainty": "Y18S mutant measurement; must not be pooled with wild-type affinity. Construct is the source HDGFRP2 PWWP expression fragment (1\u201393) carrying the stated mutation. Replicate number and titration-specific temperature are not independently specified.",
"replicates": null,
"retrieval_date": "2026-10-26",
"role": "experimentally_studied_ligand",
"source_id": "P5:S:WEI2024",
"source_reported_uncertainty": "0.02",
"source_reported_units": "mM",
"source_reported_value": "0.29",
"source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1\u20134 captions; original Supplementary Figure S2 was not retrieved",
"target_variant": "Y18S",
"uncertainty": 0.02,
"uncertainty_type": "fitting error",
"uncertainty_uM": 20.0,
"unit_conversion": "mM \u00d7 1000 = \u00b5M",
"units": "mM",
"value": 0.29,
"value_operator": "=",
"value_uM": 290.0,
"verification_level": "primary_source_verified",
"version": "phase5.chemical_curation.1.1.0"
} |
| BPPPREP:BPP | HDGFL2 PWWP 1–93Homo sapiens |
KdNMR chemical-shift perturbation Kddirect binding affinity | = 7 ± 5 µM7 µM · exact unit conversion | Experimental context
|
PMID:39031937 · 2024primary_publisher_selected_indexed_Results_and_Methods_passages; Figure S2 not independently retrievedOriginal observation record{
"DMSO_percent": null,
"abstract_reported_endpoint": null,
"abstract_reported_method": null,
"abstract_reported_units": null,
"abstract_reported_value": null,
"assay_construct_end": 93,
"assay_construct_start": 1,
"assay_record_id": "PWWP:ASSAY:0011",
"assay_type": "NMR chemical-shift perturbation Kd",
"assay_value_transferred_to_modeled_stereoisomers": 0,
"audit_decision": "retain_with_explicit_endpoint_and_identity",
"baseline_assay_record": 1,
"baseline_original": "{\"assay_record_id\": \"PWWP:ASSAY:0011\", \"assay_type\": \"NMR chemical-shift perturbation Kd\", \"ccd_id\": \"A1D73\", \"ccd_mapping_source\": \"Provenance/Literature/ligand_ccd_associations.json\", \"compound_name\": \"BPP\", \"conditions\": {}, \"domain\": \"PWWP\", \"evidence_location\": \"Results; Figure 1E\", \"evidence_url\": \"https://febs.onlinelibrary.wiley.com/doi/10.1002/1873-3468.14981\", \"gene\": \"HDGFL2\", \"interpretation\": \"Authors report intermediate-exchange limitations and additional ITC validation. This record preserves the NMR value and fitting error.\", \"numeric_value_inferred_from_structure\": false, \"pdb_id\": \"8Z6C\", \"reference_id\": \"PMID:39031937\", \"role\": \"experimentally_studied_fragment_ligand\", \"uncertainty\": 5, \"units\": \"\u00b5M\", \"value\": 7, \"value_operator\": \"=\", \"verification_level\": \"primary_full_text_sections_verified\"}",
"buffer": "HEPES-buffered saline; exact buffer/salt concentrations not restated in CSP subsection",
"ccd_id": "A1D73",
"ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
"chemical_id": "INCHIKEY:LKKNQJJSEMQTHQ-UHFFFAOYSA-N",
"chemical_identity_status": "exact_single_CCD_identity",
"component_context": null,
"compound_name": "BPP",
"conditions": "{\"fit_model\": \"1:1 binding; global fit with shared Kd\", \"ligand_to_protein_molar_ratio_range\": [0, 6], \"protein_concentration_uM\": 100, \"protein_construct\": \"HDGFL2 1\u201393\"}",
"crystallographic_component_ids": null,
"domain": "PWWP",
"domain_id": "UP:Q7Z4V5:PWWP1",
"endpoint_label_status": null,
"evidence_class": "direct_binding_affinity",
"evidence_location": "Results; Figure 1E",
"evidence_url": "https://febs.onlinelibrary.wiley.com/doi/10.1002/1873-3468.14981",
"gene": "HDGFL2",
"interpretation": "Authors report intermediate-exchange limitations and additional ITC validation. This record preserves the NMR value and fitting error.",
"molecular_entity_type": "small_molecule_preparation",
"numeric_transcription_status": "matches_primary_report",
"numeric_value_inferred_from_structure": 0,
"pH": 7.4,
"pdb_id": "8Z6C",
"preparation_id": "PREP:BPP",
"protein_id": "UP:Q7Z4V5",
"qualitative_result": null,
"reference_id": "PMID:39031937",
"remaining_uncertainty": "Intermediate-exchange NMR fit has large fitting error; ITC cross-validation reported, exact separate ITC number not extracted.",
"replicates": null,
"role": "experimentally_studied_fragment_ligand",
"source_component_url": null,
"source_id": "S04",
"source_reported_uncertainty": "5",
"source_reported_units": "\u00b5M",
"source_reported_value": "7",
"source_verification_scope": "primary_publisher_selected_indexed_Results_and_Methods_passages; Figure S2 not independently retrieved",
"temperature_C": null,
"uncertainty": 5.0,
"uncertainty_type": "fitting_error",
"uncertainty_uM": 5.0,
"unit_conversion": null,
"units": "\u00b5M",
"value": 7.0,
"value_operator": "=",
"value_uM": 7.0,
"verification_level": "primary_full_text_sections_verified"
} |
| NbH10PREP:NbH10 | HDGFL2 PWWP1 1–93Homo sapiens |
KdSPR apparent Kddirect binding affinity | = 81.2 ± 1.8 nM0.0812 µM · exact unit conversion | Experimental context
|
PMID:42194065 · 2026local_primary_full_text_XML_table_and_methods_verifiedOriginal observation record{
"DMSO_percent": null,
"abstract_reported_endpoint": null,
"abstract_reported_method": null,
"abstract_reported_units": null,
"abstract_reported_value": null,
"assay_construct_end": 93,
"assay_construct_start": 1,
"assay_record_id": "PWWP11:ASSAY:0009",
"assay_type": "SPR apparent Kd",
"assay_value_transferred_to_modeled_stereoisomers": 0,
"audit_decision": null,
"baseline_assay_record": 0,
"baseline_original": null,
"buffer": "50 mM Tris-HCl, 150 mM NaCl, 0.05% Tween 20",
"ccd_id": null,
"ccd_mapping_source": null,
"chemical_id": null,
"chemical_identity_status": "named_macromolecule_no_full_sequence_identity",
"component_context": null,
"compound_name": "NbH10",
"conditions": "{\"protein_construct\": \"HDGFL2 1\u201393\", \"replicates\": 3, \"uncertainty_type\": \"SD\"}",
"crystallographic_component_ids": null,
"domain": "PWWP1",
"domain_id": "UP:Q7Z4V5:PWWP1",
"endpoint_label_status": null,
"evidence_class": "direct_binding_affinity",
"evidence_location": "Table 1 NbH10 column; SPR methods",
"evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC13204740/",
"gene": "HDGFL2",
"interpretation": "Apparent SPR affinity of a nanobody; not a small molecule or a solved nanobody\u2013PWWP complex.",
"molecular_entity_type": "nanobody",
"numeric_transcription_status": "matches_primary_table",
"numeric_value_inferred_from_structure": null,
"pH": 7.4,
"pdb_id": null,
"preparation_id": "PREP:NbH10",
"protein_id": "UP:Q7Z4V5",
"qualitative_result": null,
"reference_id": "PMID:42194065",
"remaining_uncertainty": null,
"replicates": "3",
"role": "macromolecular_binder",
"source_component_url": null,
"source_id": "S06",
"source_reported_uncertainty": null,
"source_reported_units": null,
"source_reported_value": null,
"source_verification_scope": "local_primary_full_text_XML_table_and_methods_verified",
"temperature_C": 25,
"uncertainty": 1.8,
"uncertainty_type": "SD",
"uncertainty_uM": 0.0018,
"unit_conversion": null,
"units": "nM",
"value": 81.2,
"value_operator": "=",
"value_uM": 0.0812,
"verification_level": null
} |
| vareniclinePREP:VARENICLINE | HDGFL2 PWWP1 1–93Variant: Y18SHomo sapiens |
KdNMR chemical-shift perturbation Kddirect binding affinity | = 0.78 ± 0.05 mM780 µM · exact unit conversion | Experimental context
|
PMID:39031937 · 2024Official publisher full HTML independently inspected: Methods, Results and Figures 1–4 captions; original Supplementary Figure S2 was not retrievedOriginal observation record{
"assay_construct_end": 93,
"assay_construct_start": 1,
"assay_context": "purified_mutant_domain",
"assay_organism": "Homo sapiens",
"assay_record_id": "PWWP5:ASSAY:0027",
"assay_type": "NMR chemical-shift perturbation Kd",
"assay_value_transferred_to_modeled_stereoisomers": false,
"ccd_id": null,
"chemical_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
"compound_name": "varenicline",
"conditions": {
"binding_model": "1:1 global fit of perturbed residues",
"buffer": "HEPES-buffered saline; CSP subsection does not separately give HEPES/NaCl concentrations",
"ligand_protein_molar_ratio_range": [
0,
6
],
"pH": 7.4,
"protein_concentration_mM": 0.1,
"target_variant": "Y18S"
},
"domain": "PWWP1",
"domain_id": "UP:Q7Z4V5:PWWP1",
"endpoint": "Kd",
"evidence_class": "direct_binding_affinity",
"evidence_location": "Results; Figure 2E",
"evidence_url": "https://febs.onlinelibrary.wiley.com/doi/full/10.1002/1873-3468.14981",
"gene": "HDGFL2",
"inclusion_rationale": "Primary source explicitly identifies this preparation, target context and observation.",
"is_negative": false,
"numeric_transcription_status": "source_preserved",
"numeric_value_inferred_from_structure": false,
"pH": 7.4,
"pdb_id": null,
"preparation_id": "PREP:VARENICLINE",
"protein_id": "UP:Q7Z4V5",
"publication_year": 2024,
"reference_id": "PMID:39031937",
"remaining_uncertainty": "Y18S mutant measurement; must not be pooled with wild-type affinity. Construct is the source HDGFRP2 PWWP expression fragment (1\u201393) carrying the stated mutation. Replicate number and titration-specific temperature are not independently specified.",
"replicates": null,
"retrieval_date": "2026-10-26",
"role": "experimentally_studied_ligand",
"source_id": "P5:S:WEI2024",
"source_reported_uncertainty": "0.05",
"source_reported_units": "mM",
"source_reported_value": "0.78",
"source_verification_scope": "Official publisher full HTML independently inspected: Methods, Results and Figures 1\u20134 captions; original Supplementary Figure S2 was not retrieved",
"target_variant": "Y18S",
"uncertainty": 0.05,
"uncertainty_type": "fitting error",
"uncertainty_uM": 50.0,
"unit_conversion": "mM \u00d7 1000 = \u00b5M",
"units": "mM",
"value": 0.78,
"value_operator": "=",
"value_uM": 780.0,
"verification_level": "primary_source_verified",
"version": "phase5.chemical_curation.1.1.0"
} |
| vareniclinePREP:VARENICLINE | HDGFL2 PWWP 1–93Homo sapiens |
KdNMR chemical-shift perturbation Kddirect binding affinity | = 250 ± 40 µM250 µM · exact unit conversion | Experimental context
|
PMID:39031937 · 2024primary_publisher_selected_indexed_Results_and_Methods_passages; Figure S2 not independently retrievedOriginal observation record{
"DMSO_percent": null,
"abstract_reported_endpoint": null,
"abstract_reported_method": null,
"abstract_reported_units": null,
"abstract_reported_value": null,
"assay_construct_end": 93,
"assay_construct_start": 1,
"assay_record_id": "PWWP:ASSAY:0010",
"assay_type": "NMR chemical-shift perturbation Kd",
"assay_value_transferred_to_modeled_stereoisomers": 0,
"audit_decision": "retain_with_explicit_endpoint_and_identity",
"baseline_assay_record": 1,
"baseline_original": "{\"assay_record_id\": \"PWWP:ASSAY:0010\", \"assay_type\": \"NMR chemical-shift perturbation Kd\", \"ccd_id\": \"QMR\", \"ccd_mapping_source\": \"Provenance/Literature/ligand_ccd_associations.json\", \"compound_name\": \"varenicline\", \"conditions\": {}, \"domain\": \"PWWP\", \"evidence_location\": \"Results; Figure 1E\", \"evidence_url\": \"https://febs.onlinelibrary.wiley.com/doi/10.1002/1873-3468.14981\", \"gene\": \"HDGFL2\", \"interpretation\": \"Converted from 0.25 \u00b1 0.04 mM. Receptor pharmacology in other systems is not evidence of PWWP potency.\", \"numeric_value_inferred_from_structure\": false, \"pdb_id\": \"8Z6O\", \"reference_id\": \"PMID:39031937\", \"role\": \"experimentally_studied_fragment_ligand\", \"uncertainty\": 40, \"units\": \"\u00b5M\", \"value\": 250, \"value_operator\": \"=\", \"verification_level\": \"primary_full_text_sections_verified\"}",
"buffer": "HEPES-buffered saline; exact buffer/salt concentrations not restated in CSP subsection",
"ccd_id": "QMR",
"ccd_mapping_source": "Provenance/Literature/ligand_ccd_associations.json",
"chemical_id": "INCHIKEY:JQSHBVHOMNKWFT-DTORHVGOSA-N",
"chemical_identity_status": "exact_single_CCD_identity",
"component_context": null,
"compound_name": "varenicline",
"conditions": "{\"fit_model\": \"1:1 binding; global fit with shared Kd\", \"ligand_to_protein_molar_ratio_range\": [0, 6], \"protein_concentration_uM\": 100, \"protein_construct\": \"HDGFL2 1\u201393\"}",
"crystallographic_component_ids": null,
"domain": "PWWP",
"domain_id": "UP:Q7Z4V5:PWWP1",
"endpoint_label_status": null,
"evidence_class": "direct_binding_affinity",
"evidence_location": "Results; Figure 1E",
"evidence_url": "https://febs.onlinelibrary.wiley.com/doi/10.1002/1873-3468.14981",
"gene": "HDGFL2",
"interpretation": "Converted from 0.25 \u00b1 0.04 mM. Receptor pharmacology in other systems is not evidence of PWWP potency.",
"molecular_entity_type": "small_molecule_preparation",
"numeric_transcription_status": "matches_primary_report",
"numeric_value_inferred_from_structure": 0,
"pH": 7.4,
"pdb_id": "8Z6O",
"preparation_id": "PREP:VARENICLINE",
"protein_id": "UP:Q7Z4V5",
"qualitative_result": null,
"reference_id": "PMID:39031937",
"remaining_uncertainty": "Full assay buffer, temperature and incubation metadata not transcribed; null means uncurated, not absent.",
"replicates": null,
"role": "experimentally_studied_fragment_ligand",
"source_component_url": null,
"source_id": "S04",
"source_reported_uncertainty": "0.04",
"source_reported_units": "mM",
"source_reported_value": "0.25",
"source_verification_scope": "primary_publisher_selected_indexed_Results_and_Methods_passages; Figure S2 not independently retrieved",
"temperature_C": null,
"uncertainty": 40.0,
"uncertainty_type": "fitting_error",
"uncertainty_uM": 40.0,
"unit_conversion": "0.25 mM \u00d7 1000 = 250 \u00b5M; 0.04 mM \u00d7 1000 = 40 \u00b5M",
"units": "\u00b5M",
"value": 250.0,
"value_operator": "=",
"value_uM": 250.0,
"verification_level": "primary_full_text_sections_verified"
} |
| H4K20me3 peptide / trimethyllysine monomerPREP:H4K20me3_11mer | HDGFL2 PWWP1 Construct not curatedHomo sapiens |
Qualitative / associationFluorescence polarization bindingqualitative weak binding | Very weak; too weak to fit reliably | Experimental context
|
PMID:21720545 · 2011local_primary_full_text_XML_table_verifiedOriginal observation record{
"DMSO_percent": null,
"abstract_reported_endpoint": null,
"abstract_reported_method": null,
"abstract_reported_units": null,
"abstract_reported_value": null,
"assay_construct_end": null,
"assay_construct_start": null,
"assay_record_id": "PWWP11:ASSAY:0010",
"assay_type": "Fluorescence polarization binding",
"assay_value_transferred_to_modeled_stereoisomers": 0,
"audit_decision": null,
"baseline_assay_record": 0,
"baseline_original": null,
"buffer": null,
"ccd_id": null,
"ccd_mapping_source": null,
"chemical_id": null,
"chemical_identity_status": "defined_modified_peptide_sequence_not_monomer_identity",
"component_context": null,
"compound_name": "H4K20me3 peptide / trimethyllysine monomer",
"conditions": "{\"sequence\": \"AKRHRK(me3)VLRDN\"}",
"crystallographic_component_ids": null,
"domain": "PWWP1",
"domain_id": "UP:Q7Z4V5:PWWP1",
"endpoint_label_status": null,
"evidence_class": "qualitative_weak_binding",
"evidence_location": "Table 1 H4K20me3 / HDGF2 cell and footnote",
"evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC3119473/",
"gene": "HDGFL2",
"interpretation": "Solution binding cannot be quantified from this record; structural occupancy separately linked to 3QBY.",
"molecular_entity_type": "modified_histone_peptide",
"numeric_transcription_status": "null_preserved_for_unfittable_binding",
"numeric_value_inferred_from_structure": null,
"pH": null,
"pdb_id": "3QBY",
"preparation_id": "PREP:H4K20me3_11mer",
"protein_id": "UP:Q7Z4V5",
"qualitative_result": "Very weak; too weak to fit reliably",
"reference_id": "PMID:21720545",
"remaining_uncertainty": null,
"replicates": null,
"role": "histone_peptide_assay",
"source_component_url": null,
"source_id": "S07",
"source_reported_uncertainty": null,
"source_reported_units": null,
"source_reported_value": null,
"source_verification_scope": "local_primary_full_text_XML_table_verified",
"temperature_C": null,
"uncertainty": null,
"uncertainty_type": null,
"uncertainty_uM": null,
"unit_conversion": null,
"units": null,
"value": null,
"value_operator": null,
"value_uM": null,
"verification_level": null
} |
| H4K20me3 peptide / trimethyllysine monomerPREP:H4K20me3_11mer | HDGFL2 PWWP Construct not curatedHomo sapiens |
Qualitative / associationX-ray structural association; no pharmacological activity assignedstructural occupancy association | No quantitative observation curated | Experimental context
|
PMID:21720545 · 2011local_primary_full_text_XML; Tables 1-2, crystallization methods and ligand Results inspectedOriginal observation record{
"DMSO_percent": null,
"abstract_reported_endpoint": null,
"abstract_reported_method": null,
"abstract_reported_units": null,
"abstract_reported_value": null,
"assay_construct_end": null,
"assay_construct_start": null,
"assay_record_id": "PWWP:ASSAY:0036",
"assay_type": "X-ray structural association; no pharmacological activity assigned",
"assay_value_transferred_to_modeled_stereoisomers": 0,
"audit_decision": "separate_whole_peptide_preparation_from_M3L_monomer",
"baseline_assay_record": 1,
"baseline_original": "{\"assay_record_id\": \"PWWP:ASSAY:0036\", \"assay_type\": \"X-ray structural association; no pharmacological activity assigned\", \"ccd_id\": \"M3L\", \"component_context\": \"nonstandard_polymer_monomer\", \"compound_name\": \"H4K20me3 peptide / trimethyllysine monomer\", \"conditions\": {}, \"domain\": \"PWWP\", \"evidence_location\": \"Table 2; RCSB polymer entity 2\", \"evidence_url\": \"https://pmc.ncbi.nlm.nih.gov/articles/PMC3119473/\", \"gene\": \"HDGFL2\", \"interpretation\": \"Chain H is an 11-residue H4K20me3 peptide AKRHR(M3L)VLRDN. M3L is a modified polymer monomer, not a free drug. The modeled subset must be distinguished from the full deposited peptide.\", \"numeric_value_inferred_from_structure\": false, \"pdb_id\": \"3QBY\", \"reference_id\": \"PMID:21720545\", \"role\": \"histone methyllysine surrogate/partially resolved peptide\", \"source_component_url\": \"https://data.rcsb.org/rest/v1/core/polymer_entity/3QBY/2\", \"uncertainty\": null, \"units\": null, \"value\": null, \"value_operator\": \"=\", \"verification_level\": \"primary_full_text_sections_verified\"}",
"buffer": null,
"ccd_id": "M3L",
"ccd_mapping_source": null,
"chemical_id": null,
"chemical_identity_status": "defined_modified_peptide_sequence_not_monomer_identity",
"component_context": "nonstandard_polymer_monomer",
"compound_name": "H4K20me3 peptide / trimethyllysine monomer",
"conditions": "{}",
"crystallographic_component_ids": null,
"domain": "PWWP",
"domain_id": "UP:Q7Z4V5:PWWP1",
"endpoint_label_status": null,
"evidence_class": "structural_occupancy_association",
"evidence_location": "Table 2; RCSB polymer entity 2",
"evidence_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC3119473/",
"gene": "HDGFL2",
"interpretation": "Chain H is an 11-residue H4K20me3 peptide AKRHR(M3L)VLRDN. M3L is a modified polymer monomer, not a free drug. The modeled subset must be distinguished from the full deposited peptide.",
"molecular_entity_type": "modified_histone_peptide",
"numeric_transcription_status": "not_a_quantitative_affinity_record",
"numeric_value_inferred_from_structure": 0,
"pH": null,
"pdb_id": "3QBY",
"preparation_id": "PREP:H4K20me3_11mer",
"protein_id": "UP:Q7Z4V5",
"qualitative_result": null,
"reference_id": "PMID:21720545",
"remaining_uncertainty": "M3L has a polymer residue identity. 3QBY structural occupancy coexists with very weak unfittable solution affinity in Table 1.",
"replicates": null,
"role": "histone methyllysine surrogate/partially resolved peptide",
"source_component_url": "https://data.rcsb.org/rest/v1/core/polymer_entity/3QBY/2",
"source_id": "S07",
"source_reported_uncertainty": null,
"source_reported_units": null,
"source_reported_value": null,
"source_verification_scope": "local_primary_full_text_XML; Tables 1-2, crystallization methods and ligand Results inspected",
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