机构地区: 广东工业大学
出 处: 《甘蔗糖业》 2011年第5期21-27,共7页
摘 要: 本文在摇瓶发酵的基础上,利用5 L发酵罐进行重组毕赤酵母甲醇诱导产α-葡聚糖酶发酵条件的优化。结果表明,菌体湿重250 g/L时开始诱导,诱导表达阶段溶氧控制在10%~20%,甲醇诱导90 h时α-葡聚糖酶酶活达330 U/mL。 Cultivations of Recombinant Pichia Pastoris expressing dextranase in 5L fermentor were studied. The method of methanol induction plays important role in enzyme production. The result showed: the best condition to express dextranase is that the methanol induction starts when the cell wet weight is 250 g/L and synchronously keep the dissolved oxygen (DO) between 10%-20%, the end dextranase activity reached 330 U/mL after 90 h methanol induction.
关 键 词: 重组毕赤酵母 甲醇诱导 葡聚糖酶 发酵罐 溶氧
领 域: [生物学]