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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：O19930 New Search
4PDB entries
4Biological assembly
6chain/assembly records
UNP PDB Protein and construct Assembly Composition class Protein state Molecular copy count PDB declaration Consistency status
O19930 6kac Photosystem II reaction center protein J Author chain J Reference sequence 1–42 1 Protein heterocomplex Heteromer Protein 56 56-meric （56） Consistent with protein count
O19930 6kac Photosystem II reaction center protein J Author chain j Reference sequence 1–42 1 Protein heterocomplex Heteromer Protein 56 56-meric （56） Consistent with protein count
O19930 6kad Photosystem II reaction center protein J Author chain J Reference sequence 1–42 1 Protein heterocomplex Heteromer Protein 58 58-meric （58） Consistent with protein count
O19930 6kad Photosystem II reaction center protein J Author chain j Reference sequence 1–42 1 Protein heterocomplex Heteromer Protein 58 58-meric （58） Consistent with protein count
O19930 9hei Photosystem II reaction center protein J Author chain J Reference sequence 7–42 1 Protein heterocomplex Heteromer Protein 21 21-meric （21） Consistent with protein count
O19930 9iiu Photosystem II reaction center protein J Author chain J Reference sequence 10–41 1 Protein heterocomplex Heteromer Protein 17 17-meric （17） 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.