contains a different type of CaM target sequence, the IQ motif, with consensus sequence IQxxxRGxxxR. This motif is found as a single copy in other neuronal proteins, such as neurogranin (RC3) and PEP19, and also occurs, typically in multiple conenated forms, in the large family of cytoplasmic myosin motor proteins (Cheney and Mooseker 1992). In these unconventional myosins, calmodulin acts ...