Task: Answer Verification
Input (English): Question: Does the pro-apoptotic K-Ras 4A proto-oncoprotein affect tumorigenesis in the ApcMin/+ mouse small intestine?
Answer: The K-Ras 4A proto-oncoprotein does not exhibit tumour suppressor activity in the small intestine, even though the K-ras 4A/4B ratio is reduced in adenomas lacking K-ras activating mutations.
Output (English): no