instruction:
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.
question:
 gp170 is expressed at a level 30 to 50 % of the Env precursor gp130 .
answer:
Env precursor


question:
 These clones contain most of the exon of cyclin D2 except exon 5 .
answer:
cyclin D2


question:
 Soggy , a spermatocyte - specific gene , lies 3 . 8 kb upstream of and antipodal to TEAD - 2 , a transcription factor expressed at the beginning of mouse development .
answer:

TEAD - 2