5676
To investigate a potential role of E2F-1 in differentiation , we assayed the ability of megakaryocytes to form platelets in an in vivo transgenic model .
 protein: E2F-1; cell type: megakaryocytes; cell type: platelets
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: E2F-1, megakaryocytes, platelets 
Answer:
 protein: E2F-1; cell type: megakaryocytes; cell type: platelets