Carbonic anhydrase 1 is an enzyme that in humans is encoded by the CA1 gene. Carbonic anhydrases are a large family of zinc metalloenzymes that catalyze the reversible hydration of carbon dioxide.
It is becoming more common that the latte macchiato will have a layer of milk foam on the top of the drink as well. A latte is steamed milk, espresso, and a 1/4 inch of foam ontop. It is prepared in this order: flavored syrup (if applicable), espresso, steamed milk, topped with 1/4 inch of foam.
Creme coloured, foamed milk with a thickness the size of a fingers width and often with artwork created in the foam. Latte Macchiato. Latte Macchiato is a lot like a caffe latte, since it is made from a lot of hot milk at the bottom and a small amount of espresso added on top.