Interestingly, the abundance of the enzymes whose key cysteine was observed to be less oxidized in tumor (marked in green in Fig. 2) remained unchanged, as was the case for phosphoglycerate mutase 1 (PGAM1), transaldolase 1 (TALDO1) and 6-phosphoglucolactonase (PGLS). The gene discussed is PGLS; the disease is neoplasm.