7055
HS I directs high-level expression of reporter GATA-1/lacZ genes to primitive and definitive erythroid cells and megakaryocytes in transgenic mice .
 megakaryocytes, HS I, GATA-1/lacZ genes
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:
 megakaryocytes, HS I, GATA-1/lacZ genes