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To understand the function of AML1 during B cell differentiation , we analyzed regulatory regions of B cell-specific genes for potential AML1 -binding sites and have identified a putative AML1 -binding site in the promoter of the B cell-specific tyrosine kinase gene, blk .
 AML1, regulatory regions, AML1 -binding sites, AML1, AML1, AML1 -binding site, B cell-specific tyrosine kinase gene, blk, B cell, B cell-specific genes
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:
 AML1, regulatory regions, AML1 -binding sites, AML1, AML1, AML1 -binding site, B cell-specific tyrosine kinase gene, blk, B cell, B cell-specific genes