in view of the possible involvement of n-nitroso compounds in the etiology of gastric carcinoma in man , we have examined the abilities of extracts of human gastric mucosa for the removal from dna of o6-methylguanine , the primary precarcinogenic lesion induced in dna by methylating carcinogenic n-nitroso compounds .
C0699791
gastric carcinoma
C0017136
gastric mucosa