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.

Ex Input:
We recently described the isolation and characterization of nontoxic PAP mutants , NT123 - 2 , which has a point mutation ( E176V ) in the active site that abolishes enzymatic activity , and NT124 - 3 , which has a nonsense mutation that results in deletion of the C - terminal 25 aa ( W237Stop ) .

Ex Output:
PAP mutants

Ex Input:
After dialysis online , lactate was converted by means of lactate oxidase immobilized to porous glass , and the depletion of oxygen was registered by means of a Clark electrode .

Ex Output:
lactate oxidase

Ex Input:
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 .

Ex Output:
dopamine D2 receptor