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.

Example Input: We cloned the BamHI - F fragment from the left end of Ad4 in pUC13 - 1 between the SalI and BamHI sites in order to carry out the structural analysis of the E1A region of Ad4 .
Example Output: BamHI sites

Example Input: This integration results in the production of MMTV / mdr3 fusion transcripts that originate from the antisense 5 ' LTR of the provirus .
Example Output: 5 ' LTR

Example Input: However , at the time of salvage treatment , the mean serum PSA levels were 9 . 1 and 1 . 1 ng / mL for the salvage RP and salvage RT groups , respectively ( P = 0 . 0001 ) .
Example Output:
serum PSA