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Interleukin 16 ( IL-16 ) is a chemotactic cytokine that binds to the CD4 receptor and affects the activation of T cells and replication of HIV .
 protein: chemotactic cytokine; protein: Interleukin 16; protein: CD4 receptor; cell type: T cells; protein: IL-16
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: chemotactic cytokine, Interleukin 16, CD4 receptor, T cells, IL-16 
Answer:
 protein: chemotactic cytokine; protein: Interleukin 16; protein: CD4 receptor; cell type: T cells; protein: IL-16