2860
Since anti-Ig crosslinking leads to activation of protein kinase C ( PKC ) and an increase in intracellular calcium level, Zp was tested for the response to these cellular factors .
 cellular factors, PKC, Zp, protein kinase C
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:
 cellular factors, PKC, Zp, protein kinase C