540
Alone, these agents failed to alter the suppressive effect of dexamethasone on thymidine and leucine incorporation ; however, PMA -A23187 and PMA -PHA combinations appeared to antagonize the suppression by dexamethasone .
 protein: -PHA
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