12435
BASH , a novel signaling molecule preferentially expressed in B cells of the bursa of Fabricius .
 BASH, B cells, novel signaling molecule
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:
 BASH, B cells, novel signaling molecule