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Furthermore, the significance of the present study is that the T cells , not the antigen-presenting cells , are likely to be the limiting element in the T cell proliferative response to TG and other thyroid autoantigens .
 cell type: T cells; cell type: antigen-presenting cells; protein: thyroid autoantigens; protein: TG
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:
 cell type: T cells; cell type: antigen-presenting cells; protein: thyroid autoantigens; protein: TG