12761
The augmentation of B cell proliferation by CD70 transfectants was apparent in CD27+ B cells , but was mild in CD27- B cells .
 CD27- B cells, CD27+ B cells
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:
 CD27- B cells, CD27+ B cells