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Protein Structures and Oligomeric States

Enter a protein name, UniProt accession or PDB ID. Name searches ask you to confirm the protein identity before related structures are queried.

Current Protein Identity：P23921 New Search
12PDB entries
17Biological assembly
38chain/assembly records
UNP PDB Protein and construct Assembly Composition class Protein state Molecular copy count PDB declaration Consistency status
P23921 2wgh RIBONUCLEOSIDE-DIPHOSPHATE REDUCTASE LARGE SUBUNIT Author chain A Reference sequence 75–742 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P23921 2wgh RIBONUCLEOSIDE-DIPHOSPHATE REDUCTASE LARGE SUBUNIT Author chain B Reference sequence 75–742 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P23921 3hnc Ribonucleoside-diphosphate reductase large subunit Author chain A Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P23921 3hnc Ribonucleoside-diphosphate reductase large subunit Author chain B Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P23921 3hnd Ribonucleoside-diphosphate reductase large subunit Author chain A Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P23921 3hnd Ribonucleoside-diphosphate reductase large subunit Author chain B Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P23921 3hne Ribonucleoside-diphosphate reductase large subunit Author chain A Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P23921 3hne Ribonucleoside-diphosphate reductase large subunit Author chain B Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P23921 3hnf Ribonucleoside-diphosphate reductase large subunit Author chain A Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P23921 3hnf Ribonucleoside-diphosphate reductase large subunit Author chain B Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P23921 4x3v Ribonucleoside-diphosphate reductase large subunit Author chain A Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P23921 4x3v Ribonucleoside-diphosphate reductase large subunit Author chain B Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P23921 5d1y Ribonucleoside-diphosphate reductase large subunit Author chain A Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P23921 5d1y Ribonucleoside-diphosphate reductase large subunit Author chain B Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P23921 5tus Ribonucleoside-diphosphate reductase large subunit Author chain A Reference sequence 1–792 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P23921 5tus Ribonucleoside-diphosphate reductase large subunit Author chain B Reference sequence 1–792 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P23921 5tus Ribonucleoside-diphosphate reductase large subunit Author chain A Reference sequence 1–792 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P23921 5tus Ribonucleoside-diphosphate reductase large subunit Author chain B Reference sequence 1–792 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P23921 5tus Ribonucleoside-diphosphate reductase large subunit Author chain A Reference sequence 1–792 3 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P23921 5tus Ribonucleoside-diphosphate reductase large subunit Author chain B Reference sequence 1–792 3 Protein homooligomer Homooligomer Protein 2 dimeric （2） Consistent with protein count
P23921 6aui Ribonucleoside-diphosphate reductase large subunit Author chain A Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 6 hexameric （6） Consistent with protein count
P23921 6aui Ribonucleoside-diphosphate reductase large subunit Author chain B Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 6 hexameric （6） Consistent with protein count
P23921 6aui Ribonucleoside-diphosphate reductase large subunit Author chain C Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 6 hexameric （6） Consistent with protein count
P23921 6aui Ribonucleoside-diphosphate reductase large subunit Author chain D Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 6 hexameric （6） Consistent with protein count
P23921 6aui Ribonucleoside-diphosphate reductase large subunit Author chain E Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 6 hexameric （6） Consistent with protein count
P23921 6aui Ribonucleoside-diphosphate reductase large subunit Author chain F Reference sequence 1–792 1 Protein homooligomer Homooligomer Protein 6 hexameric （6） Consistent with protein count
P23921 6l3r Ribonucleoside-diphosphate reductase large subunit Author chain A Reference sequence 75–742 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P23921 6l3r Ribonucleoside-diphosphate reductase large subunit Author chain E Reference sequence 75–742 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P23921 6l3r Ribonucleoside-diphosphate reductase large subunit Author chain A Reference sequence 75–742 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P23921 6l3r Ribonucleoside-diphosphate reductase large subunit Author chain E Reference sequence 75–742 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P23921 6l7l Ribonucleoside-diphosphate reductase large subunit Author chain A Reference sequence 75–742 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P23921 6l7l Ribonucleoside-diphosphate reductase large subunit Author chain E Reference sequence 75–742 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P23921 6l7l Ribonucleoside-diphosphate reductase large subunit Author chain A Reference sequence 75–742 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P23921 6l7l Ribonucleoside-diphosphate reductase large subunit Author chain E Reference sequence 75–742 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P23921 6lkm Ribonucleoside-diphosphate reductase large subunit Author chain A Reference sequence 75–742 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P23921 6lkm Ribonucleoside-diphosphate reductase large subunit Author chain B Reference sequence 75–742 1 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P23921 6lkm Ribonucleoside-diphosphate reductase large subunit Author chain A Reference sequence 75–742 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count
P23921 6lkm Ribonucleoside-diphosphate reductase large subunit Author chain B Reference sequence 75–742 2 Protein monomer Monomer Protein 1 monomeric （1） Consistent with protein count

“Homomeric versus heteromeric classification follows protein identity; different constructs of the same UniProt entry still require comparison of reference-sequence ranges, mutations and missing segments. Assemblies marked for review remain visible but are not included in the highest-confidence candidate set.