4KM3:
reference: Discovery of a new genetic variant of methionine aminopeptidase from Streptococci with possible post-translational modifications: biochemical and structural characterization., Arya T, Kishor C, Saddanapu V, Reddi R, Addlagatta A, PLoS One. 2013 Oct 4;8(10):e75207. doi: 10.1371/journal.pone.0075207. PMID: 24124477

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