1MAT:
reference: Structure of the cobalt-dependent methionine aminopeptidase from Escherichia coli: a new type of proteolytic enzyme., Roderick SL, Matthews BW, Biochemistry 1993 Apr 20;32(15):3907-12. PMID: 8471602

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