22520
It would be interesting to find the minimum peptide of ilvH ( the RSU of E . coli AHAS III ) that could activate other E . coli CSUs , or even those of # # species .
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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