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These biochemical variations include the degree and positioning of d - alanyl and glycosyl substitution in lipoteichoic acids , and acetylation of peptidoglycan .
 Chemical: d - alanyl; Chemical: glycosyl
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: d - alanyl; Chemical: glycosyl