10785
However, B series cells resembled the A series cells in exhibiting faster growth rates than the parental HL60 cells and showed high levels of vitamin D receptor and retinoid receptor X proteins .
 vitamin D receptor, retinoid receptor X proteins, HL60 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:
 vitamin D receptor, retinoid receptor X proteins, HL60 cells