4ZRZ:
reference: A bacteriophage endolysin that eliminates intracellular streptococci., Shen Y, Barros M, Vennemann T, Gallagher DT, Yin Y, Linden SB, Heselpoth RD, Spencer DJ, Donovan DM, Moult J, Fischetti VA, Heinrich F, Losche M, Nelson DC, Elife. 2016 Mar 15;5. doi: 10.7554/eLife.13152. PMID: 26978792

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