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.

Ex Input:
In contrast , vaccination with a peptide encoding an adenovirus type 5 ( Ad5 ) E1A CTL epitope results in CTL tolerance and enhanced growth of an Ad5 E1A - expressing tumor .

Ex Output:
Ad5 E1A

Ex Input:
Using enhancer - reporter constructs , IL - 4 specifically down - regulated the NFIL - 2B element .

Ex Output:
IL - 4

Ex Input:
The above reactions suggest that a large proportion of breast cancer patients exhibit presensitization to antigenfs found in MuMTV and MCF - 7 , which may be cross - reactive with antigens in the primary cancer .

Ex Output:
MCF - 7