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Immunoglobulin molecules on the surface of a B lymphocyte are the endogenous "receptors" to which specific antigens bind.
 cell type: B lymphocyte; protein: Immunoglobulin molecules
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: B lymphocyte; protein: Immunoglobulin molecules