5049
Interestingly, these three proteins can be phosphorylated by protein kinase A and thus form a particular subgroup within the CREB/ATF family .
 protein: protein kinase A; protein: CREB/ATF family
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: protein kinase A, CREB/ATF family 
Answer:
 protein: protein kinase A; protein: CREB/ATF family