Detailed Instructions: In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.
Q: In a paired - antigen study using MuMTV and MCF - 7 , 75 % of the breast cancer patients responded , versus 18 % of the normal women ( P less than 0 . 0050 ) .
A:
MCF - 7