2612
Temperature - shift experiments using synchronously grown cells of a delta top1 top2 temperature - sensitive ( ts ) double mutant and its isogenic top2 ts strain show that , whereas mitotic blocks can prevent killing of the top2 ts mutant at a nonpermissive temperature , the same treatments are ineffective in preventing cell death of the delta top1 top2 ts double mutant .
 GENE: delta top1; GENE: top2 temperature - sensitive ( ts ) double mutant; GENE: top2; GENE: top2 ts mutant; GENE: delta top1; GENE: top2 ts double mutant
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: delta top1, top2 temperature - sensitive ( ts ) double mutant, top2, top2 ts mutant, delta top1, top2 ts double mutant 
Answer:
 GENE: delta top1; GENE: top2 temperature - sensitive ( ts ) double mutant; GENE: top2; GENE: top2 ts mutant; GENE: delta top1; GENE: top2 ts double mutant