Detailed Instructions: 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.
Problem: The results from the present study indicate that Smad3 , Smad4 , and Smad7 , at least in part , serve as mediators linking TGF - beta1 to transcriptional regulation of IgA switching related gene and regulation of IgA class switching .
Solution:
TGF - beta1