l-cysteine , glutathione and the therapeutically used l-cysteine precursor , n-acetyl-l-cysteine , induced strong mutagenic effects in salmonella typhimurium ( reversion of the his- strains ta97 , ta92 and ta104 ) , when tested in the presence of subcellular kidney preparations .
C0010654
l-cysteine
C0001047
n-acetyl-l-cysteine