538
Alone, PMA and calcium ionophore A23187 did not affect, but together stimulated, like phytohaemagglutinin ( PHA ), leucine and, in particular, thymidine incorporation .
 protein: PHA; protein: phytohaemagglutinin
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: PHA; protein: phytohaemagglutinin