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Activation of CD4 positive T cells is a primary requirement for human immunodeficiency virus ( HIV ) entry , efficient HIV replication , and progression to AIDS , Utilizing CD4 positive T cell lines and purified T cells from normal individuals , we have demonstrated that native envelope glycoproteins of HIV , gp 160 , can induce activation of transcription factor, activated protein-1 ( AP-1 ).
 protein: gp 160; protein: transcription factor, activated protein-1; cell type: T cells; cell type: CD4 positive T cells; cell type: purified T cells; cell type: T cells; protein: native envelope glycoproteins; protein: AP-1; cell line: CD4 positive T cell lines
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: gp 160; protein: transcription factor, activated protein-1; cell type: T cells; cell type: CD4 positive T cells; cell type: purified T cells; cell type: T cells; protein: native envelope glycoproteins; protein: AP-1; cell line: CD4 positive T cell lines