Recombinant materials have been obtained which permit the production of bovine growth hormone in E. Accordingly, a recording apparatus and a reading apparatus easily and accurately determine the physical characteristics of the disc, thereby making it possible to provide suitable setting for performing an operation. The polishing selectivity of metals to silicon oxide, silicon nitride andor silicon oxynitride is increased by using a cationic polyelectrolyte. The voice coil includes a pair of lead wires. Administration of osteoprotegerin in a pharmaceutical composition prevents and treats atherosclerosis and associated cardiovascular diseases.