468
Proliferation of T cells was induced by immobilized anti-CD3 monoclonal antibody ( mAb ) in the presence or absence of an additional costimulatory signal delivered by anti-CD28 mAb .
 protein: anti-CD3 monoclonal antibody; protein: anti-CD28 mAb; cell type: T cells; protein: mAb
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: anti-CD3 monoclonal antibody; protein: anti-CD28 mAb; cell type: T cells; protein: mAb