A stabilizer shock mount attachable to a bow stabilizer assists in quieting the stabilizer during the drawing of a bow and after the bow is fired. The DNA encoding for a mutant of LysE protein, or a homologous protein thereof, is introduced into a methanol-assimilating bacterium to improve L-lysine and L-arginine productivity of the methanol-assimilating bacterium. 5 mass %, at least one eutectic stabilizing element in an Fe equivalence of 0.