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


[Q]:  Both merR genes consist of a 408 bp ORF coding for 135 amino acids .
[A]: merR genes


[Q]:  The effects of dopamine and of dopamine D2 receptor blocker haloperidol on the activity of carotid chemoreceptors were studied in 24 anesthetized , paralyzed and artificially ventilated newborn kittens aged 0 - 17 days .
[A]:
dopamine D2 receptor