organic sulfide adenosines L-cysteine derivative S-adenosyl-L-cysteine (2R)-2-amino-3-({[(2S,3S,4R,5R)-5-(6-amino-9H-purin-9-yl)-3,4-dihydroxyoxolan-2-yl]methyl}sulfanyl)propanoic acid chebi_ontology An <small>L</small>-cysteine derivative in which the thiol hydrogen of <small>L</small>-cysteine is replaced by an adenosyl group. CHEBI:90134 S-adenosylcysteine