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