5LMK:
reference: Explicit treatment of active-site waters enhances quantum mechanical/implicit solvent scoring: Inhibition of CDK2 by new pyrazolo[1,5-a]pyrimidines., Hylsova M, Carbain B, Fanfrlik J, Musilova L, Haldar S, Kopruluoglu C, Ajani H, Brahmkshatriya PS, Jorda R, Krystof V, Hobza P, Echalier A, Paruch K, Lepsik M, Eur J Med Chem. 2017 Jan 27;126:1118-1128. doi: 10.1016/j.ejmech.2016.12.023., Epub 2016 Dec 11. PMID: 28039837

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