Orthopaedic injuries associated with skimboarding.

Background: Skimboarding is a beachside water sport that is enjoying increasing popularity among both dedicated enthusiasts and casual beachgoers. Although many consider this sport to be similar to its "sister" sport, surfing, the technique, the environment in which it is performed, and the skills required differ dramatically from that of surfing. Moreover, the pattern of injuries seen in skimboarders differs substantially from those sustained while surfing.

The cloning and characterization of a second brain enzyme with NAAG peptidase activity.

The peptide neurotransmitter N-acetylaspartylglutamate is inactivated by extracellular peptidase activity following synaptic release. It is speculated that the enzyme, glutamate carboxypeptidase II (GCPII, EC 3.14.