4200
Nevertheless, forskolin also inhibits PKC downstream events , such as c-jun expression , which is critical for the activation process of T cells .
 c-jun, T cells, 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:
 c-jun, T cells, PKC