4525
HIV-1 harboring mutations within two C/EBP sites were crippled in their ability to replicate in U937 promonocytic cells , indicating that these sites are required for replication.
 cell line: U937 promonocytic cells; DNA: C/EBP sites
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: U937 promonocytic cells, C/EBP sites 
Answer:
 cell line: U937 promonocytic cells; DNA: C/EBP sites