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The Ah receptor recognizes DNA binding sites for the B cell transcription factor , BSAP : a possible mechanism for dioxin-mediated alteration of CD19 gene expression in human B lymphocytes .
 CD19 gene, human B lymphocytes, Ah receptor, transcription factor, BSAP, DNA binding sites, B cell transcription factor
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:
 CD19 gene, human B lymphocytes, Ah receptor, transcription factor, BSAP, DNA binding sites, B cell transcription factor