RXN-12621 
an [L-cysteine desulfurase]-S-sulfanyl-L-cysteine + carboxy-adenylated-[ThiS sulfur-carrier protein] + reduced two electron carrier  ->  thiocarboxylated-[ThiS sulfur-carrier protein] + an [L-cysteine desulfurase]-L-cysteine + AMP + oxidized electron carrier + 2 H+ 
NIL 
 
Gene ID	Gene Accession	Gene name	Enzymatic activity	Evidence	Organism
BSU29590	BSU29590	iscS	cysteine desulfurase	EV-EXP	Bacillus subtilis subtilis 168