In a PPA MRT method and apparatus, a selected region of k-space containing respective portions of some of the incomplete, measured data lines and respective portions of some of the complete, reconstructed data lines is designated. The isolation member supports the foot support in an extended position above the base. A dewatering portion has a compression auger screw positioned for receiving the dislodged watery cake and the wash water. The pre-filter media can be used in unique combination with other features to reduce liquid re-entrainment, andor allow increased flow capacity. The invention also relates to polynucleotide sequences comprising genes that encode proteins that are involved in the bioconversion of a carbon source such as e.