1588
Immune response of peripheral blood mononuclear cells to HBx-antigen of hepatitis B virus .
 cell type: peripheral blood mononuclear cells; protein: HBx-antigen
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: peripheral blood mononuclear cells; protein: HBx-antigen