L-cysteinyl-[SCAN] + S-nitroso-CoA = S-nitroso-L-cysteinyl-[SCAN] + CoA
l-cysteinyl-[scan] + s-nitroso-coa = s-nitroso-l-cysteinyl-[scan] + coa
L-cysteinyl-[SCAN] + S-nitroso-CoA = S-nitroso-L-cysteinyl-[SCAN] + CoA
l-cysteinyl-[scan] + s-nitroso-coa = s-nitroso-l-cysteinyl-[scan] + coa