Multiple Assemblies exist for SMTL entry 3btk
THE CRYSTAL STRUCTURES OF THE COMPLEXES BETWEEN BOVINE BETA-TRYPSIN AND TEN P1 VARIANTS OF BPTI; X-RAY DIFFRACTION 1.85 Å

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