The present invention relates to divinyl ether synthase genes, proteins, and methods of their use. The polishing media is drawn against a support surface by a vacuum applied between the polishing media and the support surface. The second housing has a second insulator and a second shell shielding the second insulator. Filter circuitry is provided which has a plurality of filter states, the number of filter states being dependent on the number of pipeline stages of the arbitration circuitry, and each resource being associated with one of the filter states. , be layered on top of one another, so that the impedance of the coil, as well as its depth in the frontback direction of motion, are low.