Alexa Fluor™ 555 酰肼
Alexa Fluor™ 555 酰肼
Invitrogen™

Alexa Fluor™ 555 酰肼

Alexa Fluor™ 555 酰肼是一种细胞示踪剂,也是一种用于标记多糖或糖蛋白中醛或酮的反应性染料。Alexa Fluor™ 555 是一种明亮的橙色荧光染料。Alexa Fluor™了解更多信息
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货号数量
A20501MP
又称 A-20501MP
1 mg
货号 A20501MP
又称 A-20501MP
价格(CNY)
5,204.00
Each
添加至购物车
数量:
1 mg
价格(CNY)
5,204.00
Each
添加至购物车
Alexa Fluor™ 555 酰肼是一种细胞示踪剂,也是一种用于标记多糖或糖蛋白中醛或酮的反应性染料。Alexa Fluor™ 555 是一种明亮的橙色荧光染料。Alexa Fluor™ 555 染料用于成像和流式细胞分析中稳定信号的生成,具有水溶性和 pH 值不敏感性(pH 值 4 至 pH 值 10)。除反应性染料制剂外,我们还提供可与多种抗体、肽、蛋白、示踪剂和扩增底物偶联并且针对细胞标记和检测进行优化的 Alexa Fluor™ 555 染料(了解更多信息)。

关于该 AlexaFluor™ 酰肼的详细信息:

•荧光基团标记:Alexa Fluor™ 555 染料
•反应性基团:酰肼
•反应性:多糖或糖蛋白中的醛或酮
•偶联物的 Ex/Em:554/567 nm
• 消光系数:159,000 cm-1M-1
• 光谱相似染料:TRITC,Cy3
• 分子量:∼1,150

细胞示踪和示踪应用
Alexa Fluor™ 酰肼和羟胺是低分子量、膜不可透过、可用醛固定的细胞示踪剂,与由其他在光谱上类似的荧光基团形成的细胞示踪剂相比,具有更明亮的荧光和更强的光稳定性。它们可通过显微注射、从膜片移液管注入或通过我们的 Influx™ 胞饮细胞上样试剂所诱导的摄取进入细胞了解更多有关细胞追踪和示踪的信息

糖蛋白和多糖标记应用
Alexa Fluor™ 酰肼和羟胺是反应性分子,可用于向含有醛或酮的生物分子添加荧光标记。醛和酮可通过高碘酸盐介导的邻二醇氧化而引入多糖和糖蛋白中。半乳糖氧化酶也可用于将糖蛋白的末端半乳糖残基氧化为醛。

酰肼与羟胺
肼衍生物与酮和醛反应从而生成相对稳定的腙。羟胺衍生物(氨基氧基化合物)与醛和酮反应生成肟。肟的水解稳定性优于腙。使用硼氢化钠 (NaBH4) 可以还原腙和肟,以进一步提高键的稳定性。

了解有关蛋白和抗体标记的更多信息
我们可提供多种可供选择的 Molecular Probes ™ 抗体和蛋白标记试剂盒,以适应您的起始料和实验设置。参见我们的抗体标记试剂盒或使用我们的标记化学选择工具进行其他选择。欲了解有关我们标记试剂盒的更多信息,请参阅 Molecular Probes™ 手册中第 1.2 节—蛋白和核酸标记试剂盒

我们还’可为您定制偶联物
如果您’无法在我们的在线目录中找到’想要的产品,我们还’可为您定制抗体或蛋白偶联物。我们的定制偶联服务是高效和保密的,我们保证我们的工作质量。我们经过 ISO 9001:2000 认证。

相关产品
DMSO(二甲亚砜)(D12345)
0.5-1 mg 用抗体偶联物纯化试剂盒 (A33086)
20-50 µg 用抗体偶联物纯化试剂盒 (A33087)
50-100 µg 用抗体偶联物纯化试剂盒 (A33088)
仅供科研使用。不可用于诊断程序。
规格
化学反应性羧酸、酮、醛
发射567 nm
激发554 nm
标签或染料Alexa Fluor™ 555
产品类型酰肼
数量1 mg
反应一部分胺、酰肼
运输条件室温
标签类型Alexa Fluor 染料
产品线Alexa Fluor
Unit SizeEach
内容与储存
室温避光储存。

常见问题解答 (FAQ)

我注入了荧光示踪剂,但在组织固定并切片后无法检测到它,哪个环节出了问题?

•请确认您所用的示踪剂交联到蛋白质上,或具有用于固定的伯胺——酰肼、赖氨酸可固定葡聚糖或蛋白质偶联物皆可。
•使用醛类固定剂交联示踪剂上的胺基。
•注入更大量或更高浓度的示踪剂。示踪剂通常注射1-20%浓度(10 mg/mL或更高)。
•确认您使用正确的荧光滤光片进行检测。您可吸取少量未稀释的示踪剂储液滴一滴到载玻片上,然后在显微镜下使用您所需的滤光片观察测试。这可验证示踪剂荧光是否可以被检测到,以及荧光显微镜的滤光片是否工作正常。
•回顾组织固定和处理步骤,确认是否存在可能影响示踪剂的试剂或处理步骤。

我用Alexa Fluor偶联生物胞素标记我的神经元以观察运输,但我想只检测逆向运输而生物胞素,似乎在同时逆向和顺向运输。 我该怎么办?

观察到这两种类型的运输是生物胞素的典型特征。带有标记的霍乱毒素B类的产品只进行逆向运输。

你们有类似于荧光黄(Lucifer Yellow)但颜色不同的神经元示踪剂吗?

Lucifer Yellow CH是一个酰肼,所以我们任一Alexa Fluor或荧光标记的酰肼产品都适于此用途。此类产品的清单请见此处(https://www.thermofisher.com/us/en/home/life-science/cell-analysis/cell-tracing-tracking-and-morphology/neuronal-tracing/hydrazides-biocytins.html#prd)。

我该如何为自己的试验选择示踪对象?

要考虑的因素有示踪对象的大小、给样方式(注射,直接上样到组织等),示踪对象是否需要固定。以下链接详细介绍了我们提供的各类神经元示踪剂的详细信息以及选择方法:

•神经元示踪(https://www.thermofisher.com/us/en/home/life-science/cell-analysis/cell-tracing-tracking-and-morphology/neuronal-tracing.html)
•选择示踪剂(https://www.thermofisher.com/us/en/home/references/molecular-probes-the-handbook/fluorescent-tracers-of-cell-morphology-and-fluid-flow/choosing-a-tracer.html)
•成像分析(http://assets.thermofisher.com/TFS-Assets/BID/Reference-Materials/bioprobes-50-journal.pdf)

你们有哪些神经元示踪产品?

详细信息请查阅此网页(https://www.thermofisher.com/us/en/home/life-science/cell-analysis/cell-tracing-tracking-and-morphology/neuronal-tracing.html)。

引用和文献 (11)

引用和文献
Abstract
Site-specific modification of AAV vector particles with biophysical probes and targeting ligands using biotin ligase.
Authors:Stachler MD, Chen I, Ting AY, Bartlett JS,
Journal:Mol Ther
PubMed ID:18560418
'We have developed a highly specific and robust new method for labeling adeno-associated virus (AAV) vector particles with either biophysical probes or targeting ligands. Our approach uses the Escherichia coli enzyme biotin ligase (BirA), which ligates biotin to a 15-amino-acid biotin acceptor peptide (BAP) in a sequence-specific manner. In this ... More
Counting contacts between neurons in 3D in confocal laser scanning images.
Authors:Wouterlood FG, Boekel AJ, Kajiwara R, Beliën JA,
Journal:J Neurosci Methods
PubMed ID:18471891
'Study of neuronal networks requires an inventory of the neurons, knowledge of fiber in- and output, and qualitative and quantitative data on the intrinsic connectivity. For this purpose we combined in rat hippocampus fluorescence neuroanatomical tracing and intracellular fluorochrome injection of neurons. Multichannel confocal laser scanning microscopy was followed by ... More
Signal sequence-independent membrane targeting of ribosomes containing short nascent peptides within the exit tunnel.
Authors:Bornemann T, Jöckel J, Rodnina MV, Wintermeyer W,
Journal:Nat Struct Mol Biol
PubMed ID:18391966
'Ribosomes synthesizing inner membrane proteins in Escherichia coli are targeted to the translocon in the plasma membrane by the signal recognition particle (SRP) and the SRP receptor, FtsY. Here we show using a purified system that membrane targeting does not require an exposed signal-anchor sequence, as SRP-dependent targeting takes place ... More
A novel role for MNTB neuron dendrites in regulating action potential amplitude and cell excitability during repetitive firing.
Authors:Leão RN, Leão RM, da Costa LF, Rock Levinson S, Walmsley B,
Journal:Eur J Neurosci
PubMed ID:18598256
'Principal cells of the medial nucleus of the trapezoid body (MNTB) are simple round neurons that receive a large excitatory synapse (the calyx of Held) and many small inhibitory synapses on the soma. Strangely, these neurons also possess one or two short tufted dendrites, whose function is unknown. Here we ... More
Mechanisms of quenching of Alexa fluorophores by natural amino acids.
Authors:Chen H, Ahsan SS, Santiago-Berrios MB, Abruña HD, Webb WW,
Journal:J Am Chem Soc
PubMed ID:20446733
Quenching of fluorophores by the same proteins that they covalently label is a phenomenon that is neither well-known nor well-characterized. It is often assumed that fluorophores are unperturbed by their target proteins. However, it has been observed that attached fluorophores can be quenched by contact with amino acids within the ... More