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重组大肠杆菌产苯丙氨酸解氨酶(PAL)发酵条件研究

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摘要 本文对重组大肠杆菌产苯丙氨酸解氨酶的发酵条件和补料培养工艺进行了研究。摇瓶培养条件下,重组菌生长和产酶的最适初糖浓度为10g/L,酵母膏的最适添加量为5g/L,培养基最适初始pH值为7.5。采用10L发酵罐对该菌进行指数流加培养,24 h细胞干重达到到82.4 g/L,产酶量达到3477U/L,比摇瓶培养最好结果分别提高了14.2和11.2倍。
出处 《中国食品工业》 2009年第4期56-57,共2页 China Food Industry
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