1PYY:
reference: The structural modifications induced by the M339F substitution in PBP2x from Streptococcus pneumoniae further decreases the susceptibility to beta-lactams of resistant strains., Chesnel L, Pernot L, Lemaire D, Champelovier D, Croize J, Dideberg O, Vernet T, Zapun A, J Biol Chem 2003 Nov 7;278(45):44448-56. Epub 2003 Aug 15. PMID: 12923202

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