959
They propose that BSAP is a key protein of B cells and that it not only influence B-cell development but also influences the balance between B-cell proliferation and immunoglobulin secretion at later stages of B-cell differentiation .
 protein: immunoglobulin; protein: key protein; protein: BSAP; cell type: B cells
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: immunoglobulin; protein: key protein; protein: BSAP; cell type: B cells