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IGF-I工程菌的高密度发酵与工艺优化 被引量:3

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摘要 为研究表达重组IGF-I(人胰岛素样生长因子-I)工程菌的优化发酵工艺条件,考察了3种不同培养基以及诱导时机、诱导剂量和诱导时间对蛋白表达的影响,用5L自控发酵罐进行分批补料培养实验,确定高密度发酵工艺条件。结果表明,以2×YT+0.5%葡萄糖为发酵培养基,经0.8mmol/LIPTG诱导5h,通过控制溶解氧以及pH反馈补料方式,发酵液最终菌体密度达到OD65021.7(菌体50.1g/L),目的蛋白表达量约占菌体总蛋白的30%。建立了该工程菌优化的高密度发酵工艺,为IGF-I的下游纯化和工业化生产奠定了基础。
出处 《发酵科技通讯》 CAS 2010年第1期4-7,共4页 Bulletin of Fermentation Science and Technology
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参考文献8

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