Catalina - group of phospholipids, structure and properties close to the lecithins (see); found together with them in the tissues (mainly in the composition of the nervous tissue). Catalina participate in the transport of fatty acids from the liver to other organs and back. At an insufficient formation of kapalinou in the liver occurs her obesity. Catalina play a role in the processes of blood coagulation, contributing to the conversion of prothrombin in the active thrombin. In addition, Catalina, being a part of the cytoplasmic membrane, define their permeability for other connections.