3229
Cells with nuclear p50 were negative for the CD38 , CD20 and CD2 markers .
 CD38, CD2 markers, CD20, p50
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:
 CD38, CD2 markers, CD20, p50