Provided is a method for preparing a substrate for growing gallium nitride and a gallium nitride substrate. The protective cover may be a portfolio style case having a front cover, a back cover, and a frame, the portfolio style cover being configure to accept a tablet computer. The thermal insulation layer is constructed of one or more filaments of e-glass. Therapeutic methods for inhibiting the growth of preneoplasticneoplastic vertebrate cells that abnormally express MN protein are disclosed. The clients may expose a user interface having one or more portions that are arranged to present and provide interaction with the content channel. The intake port extends toward the top face of a cylinder head between the camshaft and two intake valves, such that at least a part of the intake port passes through a region between the shortest lines connecting respective head portions of the intake valves and the camshaft.