1KKO:
reference: Insights into enzyme evolution revealed by the structure of methylaspartate ammonia lyase., Levy CW, Buckley PA, Sedelnikova S, Kato Y, Asano Y, Rice DW, Baker PJ, Structure (Camb) 2002 Jan;10(1):105-13. PMID: 11796115

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