3LUM:
reference: On the relevance of the Met-turn methionine in metzincins., Tallant C, Garcia-Castellanos R, Baumann U, Gomis-Ruth FX, J Biol Chem. 2010 Apr 30;285(18):13951-7. Epub 2010 Mar 4. PMID: 20202937

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