6307
Although most sequence changes are intronic , one , disease - specific single - nucleotide change 3 ( DSC3 ) , is located within an exon ( d4 ) .
 Chemical: nucleotide
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