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.

 We identified Tyr ( 112 ) and Leu ( 175 ) within the RNA - binding domain of the U1 70K protein to be cross - linked to G ( 28 ) and U ( 30 ) in stem - loop I , respectively .
U1 70K protein

 A selective transcriptional induction system for mammalian cells based on Gal4 - estrogen receptor fusion proteins .
estrogen receptor

 Recombinant protein encoded by ESX ( for epithelial - restricted with serine box ) exhibits Ets - like DNA binding specificity in electrophoretic mobility shift assays and , in transient transfection assays , transactivates Ets - responsive promoter elements including that found in the HER2 / neu oncogene .

Ets - like