18993
In this study , two E . coli mutants , HW001 and HW002 , were constructed by deleting or integrating key genes related to lipid A biosynthesis in the chromosome of E . coli W3110 .
 Chemical: lipid A
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: lipid A