1847
The stimulatory effects of gp160 are mediated through the CD4 molecule , since treatment of gp160 with soluble CD4-IgG abrogates its activity, and CD4 negative T cell lines fail to be stimulated with gp160 .
 protein: CD4-IgG; protein: gp160; protein: gp160; cell line: CD4 negative T cell lines; protein: CD4 molecule; protein: gp160
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: CD4-IgG; protein: gp160; protein: gp160; cell line: CD4 negative T cell lines; protein: CD4 molecule; protein: gp160