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J2-HS Centrifuge

制备型离心机

公司名称: Beckman Coulter
产品编号: J2-HS
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Plasma Membrane Preparation from Lilium davidii and Oryza sativa Mature and Germinated Pollen
Author:
Date:
2017-05-20
[Abstract]  Pollen germination is an excellent process to study cell polarity establishment. During this process, the tip-growing pollen tube will start elongating. The plasma membrane as the selectively permeable barrier that separates the inner and outer cell environment plays crucial roles in this process. This protocol described an efficient aqueous polymer two-phase system followed by alkaline solution washing to prepare Lilium davidii or Oryza sativa plasma membrane with high purity. [摘要]  花粉萌发是研究细胞极性的一个很好的过程。在此过程中,尖端生长的花粉管将开始延长。作为分离内外细胞环境的选择性渗透屏障的质膜在该过程中起关键作用。该方案描述了一种有效的含水聚合物两相体系,接着进行碱性溶液洗涤以制备高纯度的百合百合或水稻质膜。

背景 花粉质膜包含对花粉管生长和受精至关重要的各种蛋白质,例如受体样激酶(Wang等人,2016)和离子通道(Hamilton等人, em>,2015)。分离纯质膜(PM)是综合PM蛋白质组分析的前提。 PM制备主要有四种方法:差速离心,密度梯度离心,制备型自由流动电泳和含水聚合物两相体系。通常,差速离心通常与密度梯度离心合并,以根据其大小,形状和密度分离亚细胞组分。这种技术是快速的,但是由于细胞器密度的重叠,所得的PM产率和纯度都很低(Schindler和Nothwang,2006)。自由流动电泳和水性聚合物两相系统根据其表面性质分离膜囊泡。这两种方法可以富集PM足够纯化蛋白质组学分析(Alexandersson等人,2007)。然而,用于自由流动电泳的仪器操作复杂(Sandelius等人,1986)。相比之下,通过离心可以容易且快速地进行含水聚合物两相体系,使得该方法对PM制备更方便。 ...

Purification of Rubisco from Chlamydomonas reinhardtii
Author:
Date:
2015-12-05
[Abstract]  Chlamydomonas reinhardtii is a model organism for chloroplast studies. Besides other convenient features, the feasibility of chloroplast genome transformation distinguishes this unicellular alga as ideal for the manipulation of chloroplastic gene expression aiming biotechnological goals, such as improved biofuel and biomass production. Ribulose 1, 5-bisphosphate carboxylase/oxygenase (EC 4.1.1.39, Rubisco) is the photosynthetic carbon-fixing enzyme which is considered crucial for biomass accumulation in algal cultures. Purification of wild type and site-directed mutants of Rubisco in C. ... [摘要]  衣藻衣原体是叶绿体研究的模式生物体。 除了其他方便的特点,叶绿体基因组转化的可行性区分这种单细胞藻理想的操纵叶绿体基因表达瞄准生物技术目标,如改善生物燃料和生物质生产。 核酮糖1,5-二磷酸羧化酶/加氧酶(EC 4.1.1.39,Rubisco)是光合作用碳固定酶,其被认为对藻类培养物中的生物量累积是至关重要的。 Rubisco的野生型和定点突变体的纯化。 通常进行研究其催化性质并评估菌株的碳固定潜力。 在该方案中,通过细胞沉淀的超声处理提取Rubisco,并通过硫酸铵沉淀,蔗糖梯度离心(Goldwaithe和Bogorad,1975)和阴离子交换层析纯化。

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