NCIt definition : Kringles are autonomous structural domains, found throughout the blood clotting and
fibrinolytic proteins. Kringle domains are believed to play a role in binding mediators
(e.g., membranes, other proteins or phospholipids), and in the regulation of proteolytic
activity. Kringle domains are characterised by a triple loop, 3-disulphide bridge
structure, whose conformation is defined by a number of hydrogen bonds and small pieces
of anti-parallel beta-sheet. They are found in a varying number of copies, in some
serine proteases and plasma proteins.;