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Papain

从番木瓜乳汁的番木瓜

Company: Sigma-Aldrich
Catalog#: P4762
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Enzymatic Assays and Enzyme Histochemistry of Tuta absoluta Feeding on Tomato Leaves
Author:
Date:
2018-09-05
[Abstract]  Enzymes play a key role in insect-plant relationships. For a better understanding of these interactions, we analyzed Tuta absoluta digestive enzymes. Here, we describe a detailed protocol for the detection of trypsin and papain-like enzymes in Tuta absoluta larvae by enzyme histochemistry. This assay uses frozen and unfixed samples to avoid the loss of enzymatic activity. We also describe a protocol for the quantification of trypsin and papain-like enzymes in the larvae of Tuta absoluta at different developmental instars. [摘要]  酶在昆虫植物关系中起着关键作用。 为了更好地理解这些相互作用,我们分析了 Tuta absoluta 消化酶。 在这里,我们描述了通过酶组织化学检测 Tuta absoluta 幼虫中的胰蛋白酶和木瓜蛋白酶样酶的详细方案。 该测定使用冷冻和未固定的样品以避免酶活性的丧失。 我们还描述了在不同发育期的 Tuta absoluta 幼虫中量化胰蛋白酶和木瓜蛋白酶样酶的方案。

【背景】植物和昆虫共存了数百万年,并进化出一系列相互作用,影响不同水平的生物。昆虫设法发展不同的生理和形态适应,以克服植物防御机制。因此,更好地了解其重要功能将有助于其有针对性的控制。昆虫的不同生理功能依赖于酶:消化,呼吸,循环,肌肉,神经,生殖和内分泌。几种酶参与消化。蛋白酶如胰蛋白酶,胰凝乳蛋白酶,胃蛋白酶或羧肽酶是蛋白质消化的原因,蛋白质消化是昆虫的氨基酸来源。因此,消化蛋白酶抑制剂已被成功用于提高植物对昆虫的抗性(Smigocki et al。,2013; Quilis et al。,2014; Hamza et al ...

Mouse Subependymal Zone Explants Cultured on Primary Astrocytes
Author:
Date:
2016-07-20
[Abstract]  Neuroblast migration is a major component in the process of neuronal circuit assembly. In the rodent postnatal brain, the subependymal zone (SEZ) is the largest neurogenic niche where new neurons are born throughout life. These cells migrate several millimeters following a specific pathway called the rostral migratory stream (RMS) towards the olfactory bulb. Once they reach their final destination, they differentiate mainly as interneurons and integrate into already established neuronal circuits. Along the RMS, neuroblasts use a particular mode of migration known as chain migration. They stay attached to each other while migrating and are intimately associated with adjacent astrocytic processes. To dissect the molecular and cellular signals involved in neuroblast migration, we developed ... [摘要]  神经母细胞迁移是神经元电路组装过程中的主要组成部分。 在啮齿动物出生后的大脑中,子宫颈区(SEZ)是新生神经元生命中最大的神经源性生态位。 这些细胞沿着称为传播流(RMS)的特定途径朝向嗅球迁移几毫米。 一旦达到其最终目的地,它们主要区分为中间神经元并整合到已建立的神经元回路中。 沿着RMS,神经母细胞使用称为链转移的特定迁移模式。 它们在迁移时保持相互依赖,并与相邻的星形细胞过程密切相关。 为了解剖神经母细胞迁移中涉及的分子和细胞信号,我们开发了一种体外系统,其由在星形胶质细胞单层顶部共培养的经SEZ衍生的外植体组成。

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