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We describe here 17 dominant GCN2 mutations that lead to derepression of GCN4 expression in the absence of amino acid starvation .
 GENE: dominant GCN2 mutations; 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: dominant GCN2 mutations, GCN4 
Answer:
 GENE: dominant GCN2 mutations; GENE: GCN4