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Different amounts of the various isoforms are present within the same B-cell regardless of the developmental stage of B-cell differentiation and at least some of the isoforms are conserved between mouse and humans .
 protein: isoforms; protein: isoforms; cell type: B-cell; cell type: B-cell
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: isoforms; protein: isoforms; cell type: B-cell; cell type: B-cell