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.
1 Irish Coffee: Coffee mixed with a dash of Irish whiskey and served with cream on top. 2  Latte Macchiato: Steamed milk served in a tall glass rather than a cup that is âstainedâ by a shot of espresso coffee. 3  Long Black: Often called the âAmericanâ.