4998
Finally, we have studied the progression of one case of CLL into Richter's syndrome and have found that the Richter's cells expressed about 25-fold less A-myb RNA than the CLL cells from the same patient. The pattern of c-myb and B-myb was clearly distinct from that of A-myb .
 A-myb, B-myb, A-myb RNA, Richter's cells, CLL cells, c-myb, A-myb
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:
 A-myb, B-myb, A-myb RNA, Richter's cells, CLL cells, c-myb, A-myb