1GTL:
reference: The 1.4 a crystal structure of kumamolysin: a thermostable serine-carboxyl-type proteinase., Comellas-Bigler M, Fuentes-Prior P, Maskos K, Huber R, Oyama H, Uchida K, Dunn BM, Oda K, Bode W, Structure (Camb) 2002 Jun;10(6):865-76. PMID: 12057200

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