9884
Among them , C . pneumoniae endonuclease IV ( CpendoIV ) possesses 3 ' - 5 ' exonuclease activity that prefers to remove mismatched 3 ' - terminal nucleotides in the nick , gap , and 3 ' recess of a double - stranded DNA ( dsDNA ) .
 Chemical: nucleotides
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: nucleotides