计算溶液所需的质量、体积或浓度。
BioReagent,用于显微镜,适用于荧光分析 级 提供 ≥95%(HPLC) 纯度,适用于对基线干扰要求严格的色谱和分析工作流程。
避光,-20°C储存,干燥。超低温运输 。请查阅批次 COA 获取详细规格。
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在色谱分析、有机合成和交叉偶联反应领域已被 0 篇同行评审文献引用。
硅基罗丹明-琥珀酰亚胺酯(亦称 SiR dye 1)是一种远红荧光染料,可对含伯氨基的生物分子(如蛋白质、多肽、抗体)进行高效共价标记。NHS 酯基团可在温和水相条件下,与赖氨酸残基的 ε- 氨基或 N 端氨基发生反应,形成稳定的酰胺键。
SiR-NHS 酯属于硅罗丹明(SiR)染料家族,兼具长波长荧光、高摩尔吸光系数、优异光稳定性,光毒性与细胞毒性极低,是超高分辨显微成像(STED、SIM、PALM/STORM)以及长时间活细胞成像不可或缺的染料。与许多花菁染料不同,SiR-NHS 酯在碱性条件下性质稳定。
该染料的远红荧光不会与细胞自发荧光产生光谱重叠,该特性对于荧光显微镜、流式细胞术及其他生物分析方法十分重要。
光谱性质
最大激发波长,nm:652 nm
摩尔消光系数 (ε),L・mol⁻¹・cm⁻¹:1.0×10⁵
最大发射波长,nm:674 nm
CF260: 0.116
CF280: 0.147
SiR-NHS ester (also known as SiR dye 1) is a far-red fluorescent dye designed for efficient covalent labeling of biomolecules containing primary amines, such as proteins, peptides, and antibodies. The NHS ester group readily reacts with ε-amino groups of lysine residues or N-terminal amino groups under mild aqueous conditions, forming stable amide bonds.
SiR-NHS ester belongs to the family of silicon-rhodamine (SiR) dyes and combines long-wavelength fluorescence with high molar absorptivity, excellent photostability, and minimal photo- and cytotoxicity, making it indispensable for super-resolution microscopy (STED, SIM, PALM/STORM) and long-term live cell imaging. Unlike many cyanine dyes, SiR-NHS ester is stable under alkaline conditions.
The far-red fluorescence of the dye does not overlap with cellular autofluorescence, which is important for fluorescence microscopy, flow cytometry, and other bioanalytical methods.
Spectral properties
Excitation maximum, nm: 652 nm
ε, L⋅mol⁻¹⋅cm⁻¹: 1.0·10⁵ mol⁻¹·cm⁻¹
Emission maximum, nm: 674 nm
CF260: 0.116
CF280: 0.147