label: [mycoredoxin]-L-cysteine + arseno-mycothiol + H(+) = [mycoredoxin]-S-mycothiol-L-cysteine + arsenite
label_lc: [mycoredoxin]-l-cysteine + arseno-mycothiol + h(+) = [mycoredoxin]-s-mycothiol-l-cysteine + arsenite