7512
Both haemin and delta-ALA caused a de novo increase in alpha-globin expression as well as enhancing Epo -induced beta-globin expression , leading to a marked increase in haemoglobin production .
 alpha-globin, beta-globin, Epo
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:
 alpha-globin, beta-globin, Epo