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1. ↑ PDB: 1JBQ​; (August 2001). "Structure of human cystathionine beta-synthase: a unique pyridoxal 5'-phosphate-dependent heme protein". The EMBO Journal 20 (15): 3910–6. DOI:10.1093/emboj/20.15.3910. PMID 11483494. PMC: 149156.