9519
RXR-alpha mRNA was present in untreated U937 cells , and levels increased after induction of differentiation with phorbol ester .
 protein: RXR-alpha; cell line: U937 cells; RNA: RXR-alpha mRNA
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: RXR-alpha, U937 cells, RXR-alpha mRNA 
Answer:
 protein: RXR-alpha; cell line: U937 cells; RNA: RXR-alpha mRNA