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基因工程菌E.coli BL21/pET-DsbA-MalQ发酵产麦芽糖转糖基酶的研究 被引量:3

Study on Fermentation of Recombinant Strain E.coli BL21 /pET-DsbA-MalQ to Produce Amylomaltase
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摘要 为了获得最佳的基因工程菌E.coli BL21/pET-DsbA-MalQ发酵产酶条件,通过进行诱导时间﹑诱导温度﹑IPTG的浓度﹑诱导前菌液浓度(OD600)等因素梯度实验,研究各因素对发酵产酶的影响。实验结果表明,基因工程菌的最佳诱导条件分别为:诱导时间为2.5h,诱导温度为30℃,IPTG浓度为0.5mmol/L,诱导前OD600值为0.5。在最佳工艺条件下,粗酶液的酶活为130U,相当于出发菌产酶效率的135倍。 The effect of inducing time, inducing temperature, concentration of IPTG and concentration of cells (OD600) on fermentation of E.coli BL21/pET-DsbA-MalQ were studied. The optimum conditions were inducing time 2.5 h, inducing temperature 30℃, concentration of IPTG 0.5 mmol/L and concentration of cells (OD600) 0.5 respectively. When the E.coli BL21/ pET-DsbA-MalQ was incubated at the optimum conditions, the activity of crude enzyme was 130 U, and it was 135 times of enzyme activity of initial strain.
出处 《食品科学》 EI CAS CSCD 北大核心 2007年第8期285-289,共5页 Food Science
基金 江西省教育厅项目(赣财教[2004]18号-18)
关键词 E.COLI BL21/pET-DsbA-MalQ 诱导时间 诱导温度 IPTG浓度 麦芽糖转糖基酶 E.coli BL21/pET-DsbA-MalQ inducing time inducing temperature concentration of IPTG amylomaltase
作者简介 王水兴(1965-),男,副教授,博士,主要从事食品生物技术研究。
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二级参考文献55

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