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]:  With this study , a total of 13 operators for the glp regulon have been characterized .
[A]: glp regulon


[Q]:  The polypeptide encoded by the cDNA contained 450 amino acids with a calculated M ( r ) of 52 , 057 , and showed significant homology with human and mouse CAD ( 22 % identity ) .
[A]: mouse CAD


[Q]:  Platelet factor 4 levels in patients with coronary artery disease .
[A]:
Platelet factor 4