5F2R:
reference: Probing the ATP Site of GRP78 with Nucleotide Triphosphate Analogs., Hughes SJ, Antoshchenko T, Chen Y, Lu H, Pizarro JC, Park HW, PLoS One. 2016 May 4;11(5):e0154862. doi: 10.1371/journal.pone.0154862., eCollection 2016. PMID: 27144892

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