Xenin-8 TFA

发表于由

Xenin-8 TFA;

Xenin-8 TFA 是 Xenin 的 C 端八肽，也是 Xenin 的生物活性片段。Xenin 属于神经降压素/xenopsin 家族的多肽。Xenin-8 TFA 刺激基础胰岛素分泌，并以剂量依赖的方式增强胰岛素对葡萄糖的反应 (EC50=0.16 nM)。

Xenin-8 TFAamp;;

Xenin-8 TFA Chemical Structure

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生物活性

Xenin-8 TFA, a C-terminal octapeptide, is a biologically active fragment of Xenin. Xenin is a 25-amino acid peptide of the neurotensin/xenopsin family. Xenin-8 TFA stimulates basal insulin secretion and potentiates the insulin response to glucose in a dose-dependent manner (EC50=0.16 nM)[1].

体外研究
(In Vitro)

Xenin-8 TFA augments Arginine-induced insulin release (by 40%) and potentiates the glucagon responses to both Arginine (by 60%), Carbachol (by 50%). Xenin-8 TFA counteracts the inhibition of glucagon release induced by increasing the glucose concentration[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.
分子量

1160.29

Formula

C53H80F3N15O11
Sequence Shortening

HPKRPWIL
运输条件

Room temperature in continental US; may vary elsewhere.
储存方式

Please store the product under the recommended conditions in the Certificate of Analysis.
Solvent Solubility
In Vitro:;

H2O

Peptide Solubility and Storage Guidelines:

1.;;Calculate the length of the peptide.

2.;;Calculate the overall charge of the entire peptide according to the following table:

; Contents Assign value
Acidic amino acid Asp (D), Glu (E), and the C-terminal -COOH. -1
Basic amino acid Arg (R), Lys (K), His (H), and the N-terminal -NH2 +1
Neutral amino acid Gly (G), Ala (A), Leu (L), Ile (I), Val (V), Cys (C), Met (M), Thr (T), Ser (S), Phe (F), Tyr (Y), Trp (W), Pro (P), Asn (N), Gln (Q) 0

3.;;Recommended solution:

Overall charge of peptide Details
Negative (lt;0) 1.;;Try to dissolve the peptide in water first.
2.;;If water fails, add NH4OH (lt;50 μL).
3.;;If the peptide still does not dissolve, add DMSO (50-100 μL) to solubilize the peptide.
Positive (gt;0) 1.;;Try to dissolve the peptide in water first.
2.;;If water fails, try dissolving the peptide in a 10%-30% acetic acid solution.
3.;;If the peptide still does not dissolve, try dissolving the peptide in a small amount of DMSO.
Zero (=0) 1.;;Try to dissolve the peptide in organic solvent (acetonitrile, methanol, etc.) first.
2.;;For very hydrophobic peptides, try dissolving the peptide in a small amount of DMSO, and then dilute the solution with water to the desired concentration.
参考文献

  • [1]. Ramona A Silvestre, et al. Stimulatory effect of xenin-8 on insulin and glucagon secretion in the perfused rat pancreas. Regul Pept. 2003 Aug 15;115(1):25-9.