1734
With only purified T antigen in the presence of topoisomerase I to unwind purified DNA , ori - auxiliary sequences strongly facilitated T - antigen - dependent DNA conformational changes consistent with melting the first 50 base pairs .
 GENE: T antigen; GENE: topoisomerase I; GENE: T - antigen
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: T antigen, topoisomerase I, T - antigen 
Answer:
 GENE: T antigen; GENE: topoisomerase I; GENE: T - antigen