9963
Proteins of the ATF/ CREB class of transcription factors stimulate gene expression of several cell growth-related genes through protein kinase A-related cAMP response elements .
 DNA: protein kinase A-related cAMP response elements; protein: transcription factors; DNA: cell growth-related genes; protein: CREB
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-related cAMP response elements, transcription factors, cell growth-related genes, CREB 
Answer:
 DNA: protein kinase A-related cAMP response elements; protein: transcription factors; DNA: cell growth-related genes; protein: CREB