1122
OBJECTIVES: To analyze the effect of retinoic acids ( RA ) on HIV-1 expression and correlate this effect with expression levels of RA receptors ( RARs ) in T-lymphoid and monocytoid cell lines .
 protein: RA receptors; protein: RARs
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: RA receptors, RARs 
Answer:
 protein: RA receptors; protein: RARs