1424
Transcription of the metH gene in Salmonella typhimurium and Escherichia coli is positively regulated by the metR gene product , a DNA binding protein .
 GENE: metH gene in Salmonella typhimurium and Escherichia coli; GENE: metR gene product
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: metH gene in Salmonella typhimurium and Escherichia coli, metR gene product 
Answer:
 GENE: metH gene in Salmonella typhimurium and Escherichia coli; GENE: metR gene product