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In vitro transcription of capped mRNA with modified nucleotides and Poly(A) tail
TSA (Tyramide Signal Amplification), used for signal amplification of ISH, IHC and IC etc.
Separation of phosphorylated and non-phosphorylated proteins without phospho-specific antibody
A convenient and sensitive way for cell proliferation assay and cytotoxicity assay
Protect the integrity of proteins from multiple proteases and phosphatases for different applications.
Iberiotoxin is a 37 amino acid peptidyl toxin isolated from the scorpion Mesobuthus tamulus and was shown to selectively block large conductance Ca2+-activated K+ channels(BKCa) in smooth muscle cells.
In single channel recordings, iberiotoxin can reversibly block outward currents mediated by BKCa in excised membrane patches from bovine aortic smooth muscle with an IC50 value of 250 pM. It is also a noncompetitive, partial inhibitor of charybdotoxin binding in bovine aortic sarcolemmal membrane vesicles (Ki = 250 pM).
Reference:
[1]. Galvez A, Gimenez-Gallego G, Reuben J P, et al. Purification and characterization of a unique, potent, peptidyl probe for the high conductance calcium-activated potassium channel from venom of the scorpion Buthus tamulus. The Journal of Biological Chemisty, 1990, 265(19): 11083-11090.
Cell lines
Rat dorsal root ganglion neurons, bladder
Preparation method
Soluble to 0.70 mg/ml in sterile water. General tips for obtaining a higher concentration: Please warm the tube at 37 ℃ for 10 minutes and/or shake it in the ultrasonic bath for a while. Stock solution can be stored below -20℃ for several months.
Reacting condition
10-100 nM
Applications
Iberiotoxin (IbTX) (10-100 nM) increased the myogenic activity of bladder, but not portal vein. IbTX caused a sustained contracture of aorta. In rat dorsal root ganglion neurons, IbTx (100 nM) reduced whole-cell outward currents in 67% of small and medium size neurons. IbTx significantly prolonged the duration of action potential and increased firing frequency of afferent neurons.
Other notes
Please test the solubility of all compounds indoor, and the actual solubility may slightly differ with the theoretical value. This is caused by an experimental system error and it is normal.
References:
[1]. Suarez-Kurtz, G. U. I. L. H. E. R. M. E., Garcia, M. L., & Kaczorowski, G. J. (1991). Effects of charybdotoxin and iberiotoxin on the spontaneous motility and tonus of different guinea pig smooth muscle tissues. Journal of Pharmacology and Experimental Therapeutics, 259(1), 439-443.
[2]. Zhang, X. F., Gopalakrishnan, M., & Shieh, C. C. (2003). Modulation of action potential firing by iberiotoxin and NS1619 in rat dorsal root ganglion neurons. Neuroscience, 122(4), 1003-1011.