184
The binding sites and partial proteolysis profile of this protein are indistinguishable from those of the erythroid protein ; also, NF-E1 messenger RNA is the same size in both the megakaryocytic and erythroid cell lines .
 protein: NF-E1; protein: erythroid protein; RNA: NF-E1 messenger RNA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: NF-E1; protein: erythroid protein; RNA: NF-E1 messenger RNA