6773
Immunocytochemical analysis demonstrated the presence of DREF polypeptide in nuclei after the eighth nuclear division cycle , suggesting that nuclear accumulation of DREF is important for the coordinate zygotic expression of DNA replication - related genes carrying DRE sequences .
 GENE: DREF polypeptide; GENE: DREF
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: DREF polypeptide, DREF 
Answer:
 GENE: DREF polypeptide; GENE: DREF