Two further enzymes that could be connected to changing hypotaurine levels were either not part of our RNA data set (glutamate decarboxylase like 1 [GADL1]) or only slightly increased in the IDH1-mut but not in IDH1-WT glioblastoma group (cysteine sulfinic acid decarboxylase [CSAD]). This evidence concerns the gene IDH1 and glioblastoma.