1580
The alpha 4 gene 5 ' flanking region acted as a promoter in transfection assays .
 GENE: alpha 4 gene
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: alpha 4 gene 
Answer:
 GENE: alpha 4 gene