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:
 Members of the steroid / hormone nuclear receptor superfamily regulate target gene transcription via recognition and association with specific cis - acting sequences of DNA , called hormone response elements ( HREs ) .
answer:
nuclear receptor superfamily


question:
 Four of these fibroblast clones were infected with a retrovirus containing the cDNA encoding myoD and a puromycin selection marker .
answer:
cDNA encoding myoD


question:
 Many human malignant cells lack methylthioadenosine phosphorylase ( MTAP ) enzyme activity .
answer:

methylthioadenosine phosphorylase