17488
Independent COMBINE models were derived for Helicobacter pylori and Mycobacterium tuberculosis DHQ2 , which is an essential enzyme in both these pathogenic bacteria that has no counterpart in human cells .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None