4L7Q:
reference: Structural insights into the hydrolysis and polymorphism of methotrexate polyglutamate by zebrafish gamma-glutamyl hydrolase., Chuankhayan P, Kao TT, Lin CC, Guan HH, Nakagawa A, Fu TF, Chen CJ, J Med Chem. 2013 Oct 10;56(19):7625-35. doi: 10.1021/jm401013e. Epub 2013 Sep 27. PMID: 24028568

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