6GMG:
reference: Structure of a glutamine donor mimicking inhibitory peptide shaped by the catalytic cleft of microbial transglutaminase., Juettner NE, Schmelz S, Kraemer A, Knapp S, Becker B, Kolmar H, Scrima A, Fuchsbauer HL, FEBS J. 2018 Oct 15. doi: 10.1111/febs.14678. PMID: 30318745

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