3685
HIV-1 infection resulted in constitutive, low-level expression of type 1 interferon ( IFN ) at the mRNA level .
 protein: IFN; protein: type 1 interferon
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: IFN, type 1 interferon 
Answer:
 protein: IFN; protein: type 1 interferon