2-aminoprop-2-enoate + hydrogen sulfide + H(+) => L-cysteine
2-aminoprop-2-enoate + hydrogen sulfide + h(+) => l-cysteine
2-aminoprop-2-enoate + hydrogen sulfide + H(+) => L-cysteine
2-aminoprop-2-enoate + hydrogen sulfide + h(+) => l-cysteine