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Sodium sulfite

Company: EMD Millipore
Catalog#: 106657
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The Sulfur Oxygenase Reductase Activity Assay: Catalyzing a Reaction with Elemental Sulfur as Substrate at High Temperatures
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Date:
2017-07-20
[Abstract]  The sulfur oxygenase reductase (SOR) reaction is a dioxygen-dependent disproportionation of elemental sulfur (S0), catalyzed at optimal temperatures between 65 °C and 85 °C. Thiosulfate and sulfite are formed as oxidized products as well hydrogen sulfide as reduced product. External co-factors are not required. Usually, the SOR assay is performed in a milliliter scale in S0-containing Tris-buffer at high temperatures followed by colorimetric product quantification. In order to make the SOR assay more sensitive and better reproducible, several modifications were implemented compared to the original SOR assay (Kletzin, 1989). Here we present the modified SOR assay and the following quantification of the reaction products. [摘要]  硫加氧酶还原酶(SOR)反应是元素硫的二氧依赖性歧化(S 0 ),在65℃至85℃之间的最佳温度下催化。 硫代硫酸盐和亚硫酸盐作为还原产物形成氧化产物以及硫化氢。 不需要外部辅助因素。 通常,SOR测定在高温下以含有S 0含有Tris缓冲液的毫升标度进行,随后进行比色产物定量。 为了使SOR测定更灵敏和更好的再现性,与原始SOR测定相比,实施了几个修改(Kletzin,1989)。 在这里,我们提供修饰的SOR测定和以下反应产物的定量。
【背景】硫氧化酶还原酶(SOR)催化与亚硫酸盐,硫代硫酸盐和硫化氢作为可检测产物的元素硫的二氧依赖性歧化。最初发现的SOR来自超嗜热,硫氧化古菌和细菌。报道的温度最佳值在65℃和85℃之间,pH值在pH5和pH7.4之间是最佳的(Emmel等人,1986; Kletzin,1989; Sun等人, ,2003; Pelletier等人,2008)。令人惊讶的是,源自嗜温细菌的新生儿烟草属(SOUTH)等(2012)的嗜碱性细菌和碱性嗜碱性硫代弧菌悖论的SORs(Rühlet al。还有在pH8.4和pH9.0下分别具有约80℃的温度最佳值。大多数SOR可以在E中生产。大肠杆菌通过异源基因表达,并且只有该酶的第一个描述源自从其天然来源纯化的蛋白质(Emmel等人,1986; Kletzin,1989; Pelletier et al。 ...

Bioassay of Xanthomonas albilineans Attachment on Sugarcane Leaves
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Date:
2017-01-20
[Abstract]  Sugarcane (interspecific hybrids of Saccharum species) is an economically important crop that provides 70% of raw table sugar production worldwide and contributes, in some countries, to bioethanol and electricity production. Leaf scald, caused by the bacterial plant pathogen Xanthomonas albilineans, is one of the major diseases of sugarcane. Dissemination of X. albilineans is mainly ensured by contaminated harvesting tools and infected stalk cuttings. However, some strains of this pathogen are transmitted by aerial means and are able to survive as epiphytes on the sugarcane phyllosphere before entering the leaves and causing disease. Here we present a protocol to estimate the capacity of attachment of X. albilineans to sugarcane leaves. Tissue-cultured ... [摘要]  甘蔗(蔗糖种类的种间杂交种)是一种经济上重要的作物,其在世界范围内提供70%的生食糖生产,并在一些国家对生物乙醇和电力生产作出贡献。由细菌植物病原体Xanthomonas albilineans引起的叶片烫伤是甘蔗的主要疾病之一。传播X。 albilineans主要由受污染的收获工具和感染的茎秆确保。然而,这种病原体的一些菌株通过空中装置传播,并且能够在进入叶子并引起疾病之前作为甘蔗叶片上的附生植物生存。在这里,我们提出一个协议来估计X的附件容量。白皮书到甘蔗叶。将组织培养的甘蔗小植物浸入X的细菌悬浮液中。白皮书和X附件。通过两种方法确定了白皮书:叶片印记(半定量方法)和叶洗/匀浆(定量方法)。这些方法是评估甘蔗叶烫伤病原体菌株/突变体致病性的重要手段。

背景 管理X之间相互作用的机制。 albilineans 和它的宿主植物(甘蔗)不是公知的。 Albicidin是由白念珠菌产生的植物毒素,是已被证明在这种病原体的致病性中发挥作用的唯一分子因子(Birch,2001)。然而,X的致病性。白皮书不完全依赖于albicidin。缺乏Albicidin的突变体仍然能够有效地定殖甘蔗茎并产生疾病症状(Birch,2001; ...

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