4R7B:
reference: Structural and enzymatic characterization of the choline kinase LicA from Streptococcus pneumoniae., Wang L, Jiang YL, Zhang JR, Zhou CZ, Chen Y, PLoS One. 2015 Mar 17;10(3):e0120467. doi: 10.1371/journal.pone.0120467., eCollection 2015. PMID: 25781969

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