In vitro transcription of capped mRNA with modified nucleotides and Poly(A) tail
Tyramide Signal Amplification (TSA)
TSA (Tyramide Signal Amplification), used for signal amplification of ISH, IHC and IC etc.
Phos Binding Reagent Acrylamide
Separation of phosphorylated and non-phosphorylated proteins without phospho-specific antibody
Cell Counting Kit-8 (CCK-8)
A convenient and sensitive way for cell proliferation assay and cytotoxicity assay
SYBR Safe DNA Gel Stain
Safe and sensitive stain for visualization of DNA or RNA in agarose or acrylamide gels.
Protect the integrity of proteins from multiple proteases and phosphatases for different applications.
Km: 0.89 mM for neuraminidase
X-Neu5Ac is a new substrate for chromogenic assay of neuraminidase activity in bacterial expression systems.
Many studies have focused on the functional role of cell surface gangliosides, which are thought to facilitate antigenicity, cell-cell recognition and cell growth regulation. Nacetyl neuraminic acid (Neu5Ac) within gangliosides Plays a key function in these roles. Chromogenic substrates, such as Neu5Ac, are used routinely for cytologic, histologic and spectroscopic analyses of enzyme activity.
In vitro: X-Neu5Ac was hydrolyzed by neuraminidase to release a halogenated product undergoing rapid aerobic oxidation to form the dark blue pigment. Preliminary kinetic studies indicated that X-Neu5Ac was a good and stable substrate for neuraminidase. In addition, X-Neu5Ac would also be hydrolyzed mutant enzymes .
In vivo: To visualize extracellular sialidase activity on the membrane surface in the rat brain, acute brain slices were incubated with X-Neu5Ac at pH 7.3. After 1h, myelin-abundant regions showed intense fluorescence in the rat brain. Although the hippocampus showed weak fluorescence in the brain, mossy fiber terminals in the hippocampus showed relatively intense fluorescence. In addition, the fluorescence intensities caused by X-Neu5Ac was correlated with the sialidase activity. Therefore, staining with X-Neu5Ac was specific for sialidase and useful for quantitative analysis of sialidase activities .
Clinical trial: N/A
 Fujii I,Iwabuchi Y,Teshima T,Shiba T,Kikuchi M. X-Neu5Ac: a novel substrate for chromogenic assay of neuraminidase activity in bacterial expression systems. Bioorg Med Chem.1993 Aug;1(2):147-9.
 Minami A,Shimizu H,Meguro Y,Shibata N,Kanazawa H,Ikeda K,Suzuki T. Imaging of sialidase activity in rat brain sections by a highly sensitive fluorescent histochemical method. Neuroimage.2011 Sep 1;58(1):34-40.
|Physical Appearance||A solid|
|Storage||Store at -20°C|
|Solubility||≥28 mg/mL in DMSO; insoluble in EtOH; ≥19.9 mg/mL in H2O|
|Shipping Condition||Evaluation sample solution: ship with blue ice. All other available sizes: ship with RT, or blue ice upon request.|
|General tips||For obtaining a higher solubility, please warm the tube at 37°C and shake it in the ultrasonic bath for a while. Stock solution can be stored below -20°C for several months.|
Quality Control & MSDS
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