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Our previous studies on the function of the HIV-1-encoded Nef protein suggested that Nef may be an inhibitor HIV-1 transcription .
 protein: HIV-1-encoded Nef protein; protein: Nef
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: HIV-1-encoded Nef protein, Nef 
Answer:
 protein: HIV-1-encoded Nef protein; protein: Nef