5Y33:
reference: Structural basis for controlling the enzymatic properties of polymannuronate preferred alginate lyase FlAlyA from the PL-7 family., Qin HM, Miyakawa T, Inoue A, Nishiyama R, Nakamura A, Asano A, Ojima T, Tanokura M, Chem Commun (Camb). 2018 Jan 11;54(5):555-558. doi: 10.1039/c7cc06523j. PMID: 29292806

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