The present invention provides GPCR polypeptides and polynucleotides, recombinant materials, and transgenic mice, as well as methods for their production. The hand rest assembly is slidable along the shaft and includes a clamp that clamps against the shaft to fix the position of the hand rest assembly at substantially continuously variable positions along the shaft. Additionally, systems and methods may provide retrieval of primary data from a database based at least in part on tags that match at least part of a query. The method includes analyzing and scheduling IP flows over the shared wireless bandwidth.