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Analysis of the small molecule byproducts of DNA scission supports the conclusion that cleavage occurs via H - atom abstraction from the sugar moieties , consistent with a PCET mechanism .
 Chemical: H; Chemical: sugar
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: H; Chemical: sugar