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A recent study in Icelanders identified a rare missense single nucleotide polymorphism ( SNP ) in the ALDH16A1 gene , ALDH16A1 * 2 , to be associated with gout and serum uric acid levels .
 Chemical: nucleotide; Chemical: uric acid
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: nucleotide; Chemical: uric acid