preferred_name: (sulfur carrier)-SH + L-alanine => (sulfur carrier)-H + L-cysteine
preferred_name_lc: (sulfur carrier)-sh + l-alanine => (sulfur carrier)-h + l-cysteine
label: (sulfur carrier)-SH + L-alanine => (sulfur carrier)-H + L-cysteine
label_lc: (sulfur carrier)-sh + l-alanine => (sulfur carrier)-h + l-cysteine