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Multiple Assemblies exist for SMTL entry 3btd
The Crystal Structures of the Complexes Between the Bovine Beta-Trypsin and Ten P1 Variants of BPTI.; X-RAY DIFFRACTION 1.90 Å

SMTL ID
3btd.1
Ligands
CALCIUM ION; SULFATE ION
Polypeptides
PROTEIN (TRYPSIN); PROTEIN (BOVINE PANCREATIC TRYPSIN INHIBITOR)
Oligo-state
hetero-1-1-mer
SMTL ID
3btd.2
Ligands
CALCIUM ION; SULFATE ION
Polypeptides
PROTEIN (TRYPSIN); PROTEIN (BOVINE PANCREATIC TRYPSIN INHIBITOR)
Oligo-state
hetero-4-4-mer