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公开(公告)号:US07250274B2
公开(公告)日:2007-07-31
申请号:US10735149
申请日:2003-12-12
申请人: Chung Chan , Bruce L. Zamost , Douglas C. Covert , Hong Y. Liu , Karen S. De Jongh , Jeffrey D. Meyer , Susan D. Holderman
发明人: Chung Chan , Bruce L. Zamost , Douglas C. Covert , Hong Y. Liu , Karen S. De Jongh , Jeffrey D. Meyer , Susan D. Holderman
IPC分类号: C12P21/02
CPC分类号: C07K14/54
摘要: The expression vectors and methods using an E. coli expression system for the large scale production of IL-21 are described. The vectors utilize the IL-21 coding sequence with specific changes in nucleotides in order to optimize codons and mRNA secondary structure for translation in E. coli. Using the expression vectors, the IL-21 gene was produced in E. coli to a level of greater than 1 g/L in fed batch fermentation. Also included are OmpT deficient E. coli strains transformed with an IL-21 expression vector.
摘要翻译: 描述了用于大规模生产IL-21的大肠杆菌表达系统的表达载体和方法。 载体利用具有核苷酸特异性变化的IL-21编码序列,以优化用于大肠杆菌翻译的密码子和mRNA二级结构。 使用表达载体,在补料分批发酵中,在大肠杆菌中产生IL-21基因至大于1g / L的水平。 还包括用IL-21表达载体转化的OmpT缺陷型大肠杆菌菌株。
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公开(公告)号:US07745176B2
公开(公告)日:2010-06-29
申请号:US11539036
申请日:2006-10-05
申请人: Bruce L. Zamost , Douglas C. Covert
发明人: Bruce L. Zamost , Douglas C. Covert
CPC分类号: C07K14/54
摘要: The expression vectors and methods using an E. coli expression system for the large scale production of IL-21 are described. The vectors utilize the IL-21 coding sequence with specific changes in nucleotides in order to optimize codons and mRNA secondary structure for translation in E. coli. Using the expression vectors, the IL-21 gene was produced in E. coli to a level of greater than 1 g/L in fed batch fermentation. Also included are OmpT deficient E. coli strains transformed with an IL-21 expression vector.
摘要翻译: 描述了用于大规模生产IL-21的大肠杆菌表达系统的表达载体和方法。 载体利用具有核苷酸特异性变化的IL-21编码序列,以优化用于大肠杆菌翻译的密码子和mRNA二级结构。 使用表达载体,在补料分批发酵中,在大肠杆菌中产生IL-21基因至大于1g / L的水平。 还包括用IL-21表达载体转化的OmpT缺陷型大肠杆菌菌株。
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公开(公告)号:US4026040A
公开(公告)日:1977-05-31
申请号:US383370
申请日:1973-07-26
IPC分类号: G09B23/18
CPC分类号: G09B23/182
摘要: An educational kit for aiding a student in the understanding of the induction of electrical current and the basic functions of inductors in electrical circuits is disclosed. The educational kit includes an instructional device, preferably in the form of an audiovisual instructional device, and a simulator board that enables a student to use magnets to induce measurable current and also enables a student to measure the effects of inductors in active electrical circuits that the student designs and assembles on the simulator board.
摘要翻译: 公开了一种用于帮助学生理解电流感应和电路中电感器的基本功能的教学用具。 教育套件包括教学装置,优选以视听教学装置的形式,以及模拟器板,其使得学生能够使用磁体来诱导可测量的电流,并且还使学生能够测量有源电路中的电感器的影响, 学生在模拟器板上设计和组装。
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