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N-2-Hydroxyethylpiperazine-N'-2-ethane sulphonic acid (HEPES) PUFFERAN® ≥99.5%, p.a.

HEPES

Company: Carl Roth
Catalog#: 9105
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Quantitative Determination of Poly-β-hydroxybutyrate in Synechocystis sp. PCC 6803
Author:
Date:
2017-07-20
[Abstract]  Cyanobacteria synthesize a variety of chemically-different, high-value biopolymers such as glycogen (polyglucose), poly-β-hydroxybutyrate (PHB), cyanophycin (polyamide of arginine and aspartic acid) and volutin (polyphosphate) under excess conditions. Especially under unbalanced C to N ratios, glycogen and in some cyanobacterial genera also PHB are massively accumulated in the progression of the general nitrogen stress response. Several different technologies have been established for in situ and in vitro PHB analysis from different microbial sources. In this protocol, a rapid and reliable spectrophotometric method is described for PHB quantification in the cyanobacterium Synechocystis sp. PCC 6803 upon nitrogen deprivation as described in (Damrow et ... [摘要]  蓝细菌合成各种化学上不同的高价值生物聚合物,如糖原(polyglucose),poly-β-β-羟基丁酸酯(PHB),蓝藻素(精氨酸和天冬氨酸的聚酰胺)和挥发物(多磷酸盐) 在超额条件下。 特别是在不平衡的C至N比下,糖原和一些蓝藻属中,PHB在一般氮应激反应进程中大量积累。 已经针对不同微生物来源的原位实验和/或从体外分析,建立了几种不同的技术。 在该协议中,描述了用于蓝藻(Stechocystis)的PHB定量的快速可靠的分光光度法。 如(Damrow等人,2016)中描述的氮缺乏的PCC 6803。
【背景】非重氮营养蓝细菌,例如集胞藻(Synechocystis) PCC 6803通过漂白来解决缺乏组合的氮源,这是一种被称为褪绿的过程(Allen和Smith,1969)。这种驯化反应的特征在于四个主要的结构和形态变化:(i)类囊体层之间的电子致密糖原夹杂物(直径约40nm)的大量积累伴随着(ii)藻糖酵母天线复合物的降解, (iii)类囊体膜层的拆卸,包括数量减少和包装密度,和(iv)形成不同的电子透明PHB颗粒(直径约400-500nm)(Damrow等人,2016)。由于不存在分解代谢酶和PHB缺陷型突变体的明显表型,所以在几种物种中合成的蓝细菌PHB代谢的生理功能是相当不透明的(Beck等人,2012; van ,2010; Damrow等人,2016; ...

Extraction of Chloroplast Proteins from Transiently Transformed Nicotiana benthamiana Leaves
Author:
Date:
2014-09-20
[Abstract]  This rapid protocol allows the extraction of chloroplast enriched proteins from Nicotiana benthamiana (N. benthamiana) leaves that were transiently transformed to express an epitope tagged protein of interest. Thus, it can serve as a tool to study the chloroplastidic localization of the protein of interest when it is combined with western-blot analysis.

Agrobacterium-mediated transformation (Agroinfiltration, Romeis et al., 2001) is used to transiently express a protein carrying an epitope tag in tobacco leaves. Here, co-infiltration with an Agrobacterium strain harboring 19 K from soil-borne wheat mosaic virus suppresses posttranscriptional gene silencing and therefore increases transformation efficiency (Te et al., 2005). ...
[摘要]  该快速方案允许从瞬时转化以表达感兴趣的表位标记蛋白的本氏烟草(本氏烟草)叶中提取富含叶绿体的蛋白。因此,当它与Western印迹分析结合时,它可以作为研究目标蛋白质的叶绿体定位的工具。使用土壤杆菌介导的转化(Agroinfiltration,Romeis等人,2001)瞬时表达在烟草叶中携带表位标签的蛋白质。在这里,与土壤传播的小麦花叶病毒携带19K的农杆菌菌株的共浸润抑制转录后基因沉默,并因此增加转化效率(Te等人,2005) 。转化的叶子的叶绿体分离基于Romeis等人(2001)的修改,包括细胞壁和膜的机械破坏,通过过滤去除未破坏的组织,通过Percoll层离心分离完整叶绿体。

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