13438
A CD28 -associated signaling pathway leading to cytokine gene transcription and T cell proliferation without TCR engagement .
 protein: TCR; protein: CD28; DNA: cytokine gene
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: TCR, CD28, cytokine gene 
Answer:
 protein: TCR; protein: CD28; DNA: cytokine gene