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.

 A protein which promotes DNA strand transfer between linear double - stranded M13mp19 DNA and single - stranded viral M13mp19 DNA has been isolated from recA - E . coli .
recA -

 The MEF - 2 proteins are a family of transcriptional activators that have been detected in a wide variety of cell types .
MEF - 2

 From this comparison of aa sequences , the ATPK7 protein is considered to be a member of a novel subfamily of Ser / Thr PKs in plants .

ATPK7 protein