1330
Stimulation of cells leads to a rapid phosphorylation of I kappa B alpha , which is presumed to be important for the subsequent degradation .
 protein: I kappa B alpha; protein: I kappa B
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: I kappa B alpha; protein: I kappa B