4A0M:
reference: Amino Acid Residues Critical for the Specificity for Betaine Aldehyde of the Plant ALDH10 Isoenzyme Involved in the Synthesis of Glycine Betaine., Diaz-Sanchez AG, Gonzalez-Segura L, Mujica-Jimenez C, Rudino-Pinera E, Montiel C, Martinez-Castilla LP, Munoz-Clares RA, Plant Physiol. 2012 Apr;158(4):1570-82. Epub 2012 Feb 16. PMID: 22345508

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