6763
Identification of this region as the E . coli tmk gene was confirmed by functional complementation of a yeast dTMP kinase temperature - sensitive mutant and by in vitro enzyme assay of the thymidylate kinase activity in cell extracts of E . coli by use of tmk - overproducing plasmids .
 GENE: E . coli tmk gene; GENE: yeast dTMP kinase; GENE: thymidylate kinase; GENE: tmk
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: E . coli tmk gene, yeast dTMP kinase, thymidylate kinase, tmk 
Answer:
 GENE: E . coli tmk gene; GENE: yeast dTMP kinase; GENE: thymidylate kinase; GENE: tmk