... glutathione(GSH) are ma intained by two s ystems. One is de novosynthesis from b uilding blocks, glutamate, cysteine, andglycine, via two ATP-con suming s teps involving c-g lut-amylcysteine synthetase ... transit proteins during spermio-genesis, is rich in both arginine and cysteine. The cysteinesulfhydryls in protamine must form disulfide bond topackage DNA into small sperm head during the maturationprocess. ... Fujii1Departments of 1Biochemistry,2Obstetrics and Gynecology, and3Urology, Yamagata University School of Medicine, Yamagata,Japan;4Cell Recovery Mechanisms, RIKEN Brain Science Institute, JapanGlutathione...