9672
The absence of slow migrating forms of I kappa B beta following stimulation suggests that the phosphorylation does not necessarily constitute the signal-induced event which targets the molecule for proteolysis .
 ( protein: I kappa B beta, 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: I kappa B beta, None) 