Blue cheese of blue veins. The distinctive flavor and aroma of blue cheese arises from methyl ketones (including 2-pentanone, 2-heptanone, and 2-nonanone) which are a metabolic product of "Penicillium roqueforti". These compounds are not formed in other types of cheese fermented by bacterial acidification alone. In the European Union, many blue cheeses, such as Cabrales, Danablu, Gorgonzola, Roquefort and Blue Stilton, carry a protected designation of origin, meaning they can bear the name only if they have been made in a particular region. Similarly, individual countries have protections of their own such as France's Appellation d'Origine Contrôlée and Italy's Denominazione di Origine
String cheese in a can. String cheese String cheese refers to several different types of cheese where the manufacturing process aligns the proteins in the cheese, which makes it stringy. When mozzarella is heated to 60 °C and then stretched, the milk proteins line up. It is possible to peel strings or strips from the larger cheese. In Slovakia, korbáčiky is made, which is a salty sheep milk cheese, available smoked or unsmoked. It is traditionally made by hand-pulling steamed sheep's cheese into strings and braiding them. Cow milk versions are also available. In Armenia, traditional string cheese is made with a