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.
Latte and Macchiato as a drink, in essence â are just the same. They are originally espressos with milk in it. The difference however, is that macchiato was done to recognize the coffee with milk easily. Actually, caffe macchiato is considered as a caffe latte by virtue of its ingredient.