8694
In humans, alternative splicing of the GR precursor mRNA gives rise to two receptor isoforms, termed GRalpha and GRbeta .
 ( protein: GRalpha, None) , ( protein: GRbeta, None) , ( RNA: GR precursor mRNA, 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: GRalpha, None) , ( protein: GRbeta, None) , ( RNA: GR precursor mRNA, None) 