11760
In addition, this analysis suggests a common step in the signaling pathways that trigger I kappaB alpha , I kappaB beta , and I kappaB epsilon degradation .
 I kappaB beta, I kappaB, I kappaB, I kappaB epsilon, I kappaB alpha, I kappaB
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 I kappaB beta, I kappaB, I kappaB, I kappaB epsilon, I kappaB alpha, I kappaB