4JX7:
reference: Crystal structure of pim1 kinase in complex with a pyrido[4,3-d]pyrimidine derivative suggests a unique binding mode., Lee SJ, Han BG, Cho JW, Choi JS, Lee J, Song HJ, Koh JS, Lee BI, PLoS One. 2013 Jul 31;8(7):e70358. doi: 10.1371/journal.pone.0070358. Print 2013. PMID: 23936194

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