4814
Following PHA stimulation of PBL , the increase in AP-1 activity was delayed with respect to the augmentation of p39c-jun expression .
 p39c-jun, PBL, AP-1, PHA
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:
 p39c-jun, PBL, AP-1, PHA