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p21ras is activated by the T cell antigen receptor ( TCR ) and then co-ordinates important signaling pathways for T lymphocyte activation .
 protein: TCR; protein: T cell antigen receptor; protein: T lymphocyte; protein: p21ras
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, T cell antigen receptor, T lymphocyte, p21ras 
Answer:
 protein: TCR; protein: T cell antigen receptor; protein: T lymphocyte; protein: p21ras