Is important for morphogenesis of limb and kidney and may be involved in determining dorsoventral neural tube polarity and motor neuron induction. It may also have a function in differentiated cells or be involved in maintaining specific differentiated states. A number of isoforms are produced. Present in the adult brain, kidney, brain, heart and intestine and throughout the embryo. In the developing limb bud, the protein is expressed in the apical ectodermal ridge and the mesenchymal compartment, predominantly in the posterior region. During kidney morphogenesis, expression is initially restricted to the epithelial compartment of the pronephros and mesonephros. Belongs to the formin homology family. Cappuccino subfamily.