1TRN:
reference: Crystal structure of human trypsin 1: unexpected phosphorylation of Tyr151., Gaboriaud C, Serre L, Guy-Crotte O, Forest E, Fontecilla-Camps JC, J Mol Biol 1996 Jun 28;259(5):995-1010. PMID: 8683601

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).