1. Immunology/Inflammation
  2. Complement System
  3. C3a (70-77)

C3a (70-77)  (Synonyms: Complement 3a (70-77))

目录号: HY-P1505
产品使用指南

C3a (70-77) 是对应于C3a的COOH末端的八肽,表现出C3a的特异性和1至2%的生物活性。

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Custom Peptide Synthesis

C3a (70-77) Chemical Structure

C3a (70-77) Chemical Structure

CAS No. : 63555-63-5

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MCE 顾客使用本产品发表的 1 篇科研文献

  • 生物活性

  • 实验参考方法

  • 纯度 & 产品资料

  • 参考文献

生物活性

C3a (70-77) is an octapeptide corresponding to the COOH terminus of C3a, exhibits the specificity and 1 to 2% biologic activities of C3a.

IC50 & Target

Complement system[1]

体外研究
(In Vitro)

The direct interaction of C3a(70-77) with human mononuclear leukocytes in culture results in a concentration-dependent inhibition of the generation of LIF evoked by mitogens and by the antigen SK-SD. The extent of suppression of LIF generation by C3a(70-77) is significant at concentrations of 10-7 M or higher and exceeds 75% at 10-6 M, irrespective of the stimulus[1].
C3a (70-77) induces histamine release and degranulation of rat mast cells, promotes contraction of guinea pig ileal tissue, and enhances vascular permeability in human skin. C3a (70-77) selectively desensitizes ileal smooth muscle to C3a but not to human C5a, a related anaphylatoxin. Conversely, C3a-(70-77) is unable to contract ileal smooth muscle pretreated with natural C3a. This cross-desensitization indicates a specific interaction of C3a (70-77) with cellular C3a binding sites[2].

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

分子量

823.94

Formula

C35H61N13O10

CAS 号
Sequence

Ala-Ser-His-Leu-Gly-Leu-Ala-Arg

Sequence Shortening

ASHLGLAR

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.

纯度 & 产品资料
参考文献
Kinase Assay
[1]

2×105 mononuelear leukocytes in 0.2 mL of M199-HPS containing 15% (vol/vol) AB-positive serum are added to each well of microtiter plates without or with 10 μg/mL of Con A, PHA, or SK-SD and incubated at 37°C in 5% CO2:95% air. C3a or C3a(70-77) is introduced into some suspensions at the same time as the stimulus or buffer. After 3 d for the mitogen-stimulated cultures and 5 d for the SK-SD-stimulated cultures, 1 μCi of [3H]thymidine is added to each well. After an additional 16 h at 37°C, the uptake of [3H]thymidine is analyzed by aspirating the contents of each well with a Mash II harvester that collected and ished the leukocytes on glass fiber filters. The radioactivity in each filter is quantified, and the results for quadruplicate chambers are expressed as mean cpm+SEM[1].

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

参考文献

C3a (70-77) 相关分类

  • 摩尔计算器

  • 稀释计算器

The molarity calculator equation

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

质量   浓度   体积   分子量 *
= × ×

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

浓度 (start) × 体积 (start) = 浓度 (final) × 体积 (final)
× = ×
C1   V1   C2   V2
Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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产品名称:
C3a (70-77)
目录号:
HY-P1505
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