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Because HLA class II molecules present antigen to T cell receptors ( TCRs ), we have searched for a TCR gene associated with the production of anti- Ro(SSA) antibodies .
 protein: Ro(SSA); DNA: TCR gene; protein: anti- Ro(SSA) antibodies; protein: TCRs; protein: HLA class II molecules; protein: T cell receptors
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: Ro(SSA); DNA: TCR gene; protein: anti- Ro(SSA) antibodies; protein: TCRs; protein: HLA class II molecules; protein: T cell receptors