1945
During treatment with Hm , K562 cells constitutively expressed c-myb mRNA , and 50% of them began to synthesize hemoglobin ( Hb ).
 hemoglobin, K562 cells, Hm, Hb, c-myb mRNA
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:
 hemoglobin, K562 cells, Hm, Hb, c-myb mRNA