6531
Alternative splicing of the GC receptor ( GCR ) pre-mRNA generates a second GCR , termed GCRbeta , which does not bind GC but antagonizes the transactivating activity of the classic GCR .
 ( RNA: GC receptor ( GCR ) pre-mRNA, None) , ( protein: GCR, None) , ( protein: GCR, None) , ( protein: GC receptor, None) , ( protein: GCR, None) , ( protein: GCRbeta, 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:
 ( RNA: GC receptor ( GCR ) pre-mRNA, None) , ( protein: GCR, None) , ( protein: GCR, None) , ( protein: GC receptor, None) , ( protein: GCR, None) , ( protein: GCRbeta, None) 