2700
These results imply that the GCN3 product can promote either repression or activation of GCN4 expression depending on amino acid availability .
 GENE: GCN3 product; GENE: GCN4
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: GCN3 product, GCN4 
Answer:
 GENE: GCN3 product; GENE: GCN4