7809
We report here the cleavage of the transcription factor SP1 in the human Burkitt lymphoma cell line BL60 during anti-IgM -induced apoptosis .
 transcription factor, anti-IgM, human Burkitt lymphoma cell line BL60, SP1
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:
 transcription factor, anti-IgM, human Burkitt lymphoma cell line BL60, SP1