8433
The I alpha1 promoter activates transcription of the human germ-line C alpha1 gene for IgA1 and mediates the transforming growth factor (TGF)-beta1 responsiveness of this locus.
 ( protein: transforming growth factor (TGF)-beta1, None) , ( DNA: human germ-line C alpha1 gene, None) , ( protein: IgA1, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: transforming growth factor (TGF)-beta1, None) , ( DNA: human germ-line C alpha1 gene, None) , ( protein: IgA1, None) 