3034
B lymphocyte stimulation via both CD40 and surface Ig ( sIg ) receptors substantially induced fra-1 expression , and for both receptors, induction was protein kinase C ( PKC ) dependent .
 sIg, CD40, B lymphocyte, protein kinase C, fra-1, surface Ig, surface Ig ( sIg ) receptors, PKC
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:
 sIg, CD40, B lymphocyte, protein kinase C, fra-1, surface Ig, surface Ig ( sIg ) receptors, PKC