8757
Western blot with an N-terminal antibody showed normal levels of immunoreactive GR , but quantitative analysis with isoform-specific C-terminal antibodies revealed a markedly reduced GRalpha expression , and high GRbeta expression .
 ( protein: GRbeta, None) , ( protein: GRalpha, None) , ( protein: C-terminal antibodies, None) , ( protein: immunoreactive GR, 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: GRbeta, None) , ( protein: GRalpha, None) , ( protein: C-terminal antibodies, None) , ( protein: immunoreactive GR, None) 