L-cysteine + ATP + H(+) = L-cysteinyl-5'-AMP + diphosphate
l-cysteine + atp + h(+) = l-cysteinyl-5'-amp + diphosphate
L-cysteine + ATP + H(+) = L-cysteinyl-5'-AMP + diphosphate
l-cysteine + atp + h(+) = l-cysteinyl-5'-amp + diphosphate