ID 1.8.1.13 DE bis-gamma-glutamylcystine reductase. AN bis-gamma-glutamylcystine reductase (NADPH). AN NADPH:bis-gamma-glutamylcysteine oxidoreductase. CA 2 gamma-L-glutamyl-L-cysteine + NADP(+) = bis-gamma-glutamylcystine + CA H(+) + NADPH. CC -!- The enzyme, which is found only in halobacteria, maintains the CC concentration of gamma-glutamylcysteine, the major low molecular CC weight thiol in halobacteria. CC -!- Not identical with EC 1.8.1.7 or EC 1.8.1.14. CC -!- Formerly EC 1.6.4.9. //