A power amplifier having a phase shift and impedance transformation element is disclosed. To that end, the method includes sensing the surface and the body and moving that body to obtain a desired spatial relationship with the surface. The cDNA’s have been expressed in recombinant host cells that produce active recombinant protein. At least one of the storage devices is coupled to a first of the power branches, and at least one other storage device is coupled to another of the power branches. Pharmaceutical compositions of such compounds are useful in the removal of excess body iron from patients with iron overload diseases. An easy axis of a first or both of the AP-pinned layers is oriented at an angle of at least 5\xb0 from the ABS along a plane of the first AP-pinned layer.