5T3E:
reference: Structural and mutational analysis of the nonribosomal peptide synthetase heterocyclization domain provides insight into catalysis., Bloudoff K, Fage CD, Marahiel MA, Schmeing TM, Proc Natl Acad Sci U S A. 2016 Dec 19. pii: 201614191. PMID: 27994138

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