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short communications
The structure of bovine pancreatic trypsin inhibitor (BPTI) has been solved at 2.1 Å resolution in a new crystal form (space group P6422 with unit-cell dimensions a = b = 95.0, c = 158.1 Å). The asymmetric unit is a pentamer, but a decamer is created by application of crystallographic symmetry. The decamer of BPTI is only the fourth such assembly reported to date in the Protein Data Bank.
Keywords: bovine pancreatic trypsin inhibitor.