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In this paper , C - terminal , N - terminal , and C - and N - terminal truncation mutants of ilvH were constructed .
 Chemical: C; Chemical: N; Chemical: C; Chemical: N
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: C; Chemical: N; Chemical: C; Chemical: N