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:  gp170 is expressed at a level 30 to 50 % of the Env precursor gp130 .
Example Output: Env precursor

Example Input:  In agreement with this model , elimination of the ADAM13 cytoplasmic domain increased developmental alterations attributable to ADAM13 proteolytic activity .
Example Output: ADAM13 cytoplasmic domain

Example Input:  This distinct biochemical difference between STAT5A and STAT5B was confirmed with purified activated STAT5 recombinant proteins .
Example Output:
STAT5 recombinant proteins