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:  A constructed phylogenetic tree suggests that the UbcP1 protein may represent a member of a distinct subfamily of E2s .

A: UbcP1 protein
****
Q:  Long - range mapping by pulse - field gel electrophoresis indicated that the three mdr genes are closely linked on a genomic DNA segment of approximately 625 kilobases .

A: mdr genes
****
Q:  This complex was eliminated by mutation of either half - site , and it was supershifted by antibodies against chicken ovalbumin upstream promoter - transcription factor ( COUP - TF ) .

A:
COUP - TF
****