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.

 This enhancer element functioned in a position - and orientation - independent manner both on the Pax - QNR P0 promoter and the heterologous thymidine kinase promoter .
thymidine kinase

 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 .
lactate oxidase

 Transcriptional activation of the proopiomelanocortin gene by cyclic AMP - responsive element binding protein .

proopiomelanocortin gene