4UEX:
reference: Structure of human saposin A at lysosomal pH., Hill CH, Read RJ, Deane JE, Acta Crystallogr F Struct Biol Commun. 2015 Jul;71(Pt 7):895-900. doi:, 10.1107/S2053230X15008584. Epub 2015 Jun 27. PMID: 26144235

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