Fibronectin is an important component of the extracellular matrix and also exists as a soluble protein. It is a remarkably complex molecule: some 20 splice variants are synthesized in humans, each contains a series of 29-31 type I, II or III repeats, and the protein can bind to heparan sulphate proteoglycans, collagen, fibrin and a dozen different integrins. Keeping track of all these splice forms and binding proteins can be tricky. In this issue's Cell Science at a Glance (see p. 3861 and the accompanying poster), Roumen Pankov and Kenneth Yamada make things easier by including all you need to know in a single figure.