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Viral trans-activators such as Tax ( human T cell leukemia virus-1 , HTLV-1 ) and E2 ( bovine papilloma virus , BPV ) proteins are other agents which activate lymphokine gene expression by bypassing T cell receptor ( TCR ) mediated signaling .
 protein: Tax; protein: T cell receptor; protein: Viral trans-activators; protein: E2; DNA: lymphokine gene; protein: TCR
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: Tax; protein: T cell receptor; protein: Viral trans-activators; protein: E2; DNA: lymphokine gene; protein: TCR