1645
Surprisingly, while the addition of phytohemagglutinin further enhanced the induction of AP1 , the addition of PMA inhibited it.
 protein: phytohemagglutinin; protein: AP1
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: phytohemagglutinin; protein: AP1