18989
Construction of monophosphoryl lipid A producing Escherichia coli mutants and comparison of immuno - stimulatory activities of their lipopolysaccharides .
 Chemical: monophosphoryl 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: monophosphoryl lipid A