1,2-dimethylhydrazine-induced large bowel tumors in adult male noninbred holtzman rats contained greatly elevated levels of copper-zinc-containing superoxide dismutase ( cu-zn sd ) activity when compared to levels in normal intestinal tissue but nearly equal levels of manganese-containing superoxide dismutase ( mn sd ) activity .
C0009404
large bowel tumors
C0021853
intestinal