PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 22511607-2 2012 In mitochondria, cyanide is a potent inhibitor of the cytochrome c oxidase and is metabolized by the beta-cyanoalanine synthase CYS-C1, catalyzing the conversion of cysteine and cyanide to hydrogen sulfide and beta-cyanoalanine. Hydrogen Sulfide 189-205 cysteine synthase C1 Arabidopsis thaliana 128-134