Orange Spice Muffins

1 c All-purpose flour

1 c Whole-wheat flour

1 tb Baking powder

1 1/4 ts Ground cinnamon

1/4 ts Ground cloves

1/4 ts Ground nutmeg

1/4 ts Salt

1 Large egg

1 c Sour cream

4 tb (1/2 stick) unsalted butter;

-melted 1 tb Frozen orange juice concentr <