By selecting fo r kanamycin-resistant mutants of Bacillus stearothermophilus CU21(pFDX1) at high er temperature,a variant strain CU21-163 was obtained.

• 从嗜热脂肪芽孢杆菌CU21(FDX1)出发，提高培养温 度后选择卡那霉素抗性突变菌落，得到一个变异株CU21-163。