. "At the beginning of this reaction, 1 molecule of 'Double-strand DNA containing an uracil opposite to a guanine', and 1 molecule of 'UNG2' are present. At the end of this reaction, 1 molecule of 'UNG2 glycosylase:uracil complex' is present.

This reaction takes place in the 'nucleus'.
"^^ . . . . . "UNG glycosylase mediated recognition and binding of an uracil opposite to a guanine"^^ . . . .