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p60 was purified from CESS cells and peptide microsequencing of this protein revealed that it was lymphocyte-specific protein 1 ( LSP1 ), that is here characterized as the most prominent protein kinase C substrate in B cells .
 B cells, p60, lymphocyte-specific protein 1, CESS cells, protein kinase C substrate, LSP1
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 B cells, p60, lymphocyte-specific protein 1, CESS cells, protein kinase C substrate, LSP1