5FTW:
reference: Crystal structure of pentapeptide-independent chemotaxis receptor methyltransferase (CheR) reveals idiosyncratic structural determinants for receptor recognition., Batra M, Sharma R, Malik A, Dhindwal S, Kumar P, Tomar S, J Struct Biol. 2016 Aug 17. pii: S1047-8477(16)30174-5. doi:, 10.1016/j.jsb.2016.08.005. PMID: 27544050

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