- SynonymFc gamma RIV,CD16-2,Fcgr4
- SourceMouse CD16-2, His Tag (FC4-M52H3) is expressed from human 293 cells (HEK293). It contains AA Gly 21 - Gln 203 (Accession # A0A0B4J1G0-1).Predicted N-terminus: Gly 21Request for sequence
- Molecular Characterization
This protein carries a polyhistidine tag at the C-terminus.
The protein has a calculated MW of 22.8 kDa. The protein migrates as 28-35 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
- EndotoxinLess than 1.0 EU per μg by the LAL method.
- Purity
>90% as determined by SDS-PAGE.
- Formulation
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.
Contact us for customized product form or formulation.
- Reconstitution
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
- Storage
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
-20°C to -70°C for 12 months in lyophilized state;
-70°C for 3 months under sterile conditions after reconstitution.
Mouse CD16-2, His Tag on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 90%.
Captured Mouse CD16-2, His Tag (Cat. No. FC4-M52H3) on NTA-Series S sensor chip can bind OKT3 with an affinity constant of 154 nM as determined in a SPR assay (Biacore T200) (Routinely tested).
Loaded Mouse CD16-2, His Tag (Cat. No. FC4-M52H3) on NTA Biosensor, can bind OKT3 with an affinity constant of 140 nM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
Loaded Mouse CD16-2, His Tag (Cat. No. FC4-M52H3) on NTA Biosensor, can bind Herceptin with an affinity constant of 122 nM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
- Citations
CD38 ecto-enzyme in immune cells is induced during aging and regulates NAD + and NMN levels
Authors: Chini CCS, Peclat TR, Warner GM, et al.
Journal: Nature metabolism 2020
Application: Binding Assay
Request for Full-text
- BackgroundFcgR4(Low affinity immunoglobulin gamma Fc region receptor IV) is also known as CD16-2, FcgammaRIV, receptor for the Fc region of immunoglobulin gamma . Also acts as a receptor for the Fc region of immunoglobulin epsilon . Binds with intermediate affinity to both IgG2a and IgG2b . Does not display binding to IgG1 or IgG3. Plays a role in promoting bone resorption by enhancing osteoclast differentiation following binding to IgG2a. Binds with low affinity to both the a and b allotypes of IgE. Has also been shown to bind to IgE allotype a only but not to allotype b. Binding to IgE promotes macrophage-mediated phagocytosis, antigen presentation to T cells, production of proinflammatory cytokines and the late phase of cutaneous allergic reactions
- References
(1)Hirano M, et al. 2007. Nat Immunol. 8(7):762-71.
(2)Mancardi DA. 2008. J Clin Invest. 118(11):3738-50.
(3)Nimmerjahn F. 2005. Immunity. 23(1):41-51.
Please contact us via TechSupport@acrobiosystems.com if you have any question on this product.
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所以一个细菌或病毒可以有很多的抗原。
荚膜是某些细菌在细胞壁外包围的一层粘液性物质，一般由糖和多肽组成，是细菌的一种特殊结构。
作用：
①抗吞噬作用：荚膜因其亲水性及其空间占位、屏障作用，可有效抵抗寄主吞噬细胞的吞噬作用。
②黏附作用：荚膜多糖可使细菌彼此间粘连，也可黏附于组织细胞或无生命物体表面，是引起感染的重要因素，具有荚膜的S-型肺炎链球菌毒力强，有助于肺炎链球菌侵染人体；废水生物处理中的细菌荚膜有生物吸附作用，将废水中的有机物、无机物及胶体吸附在细菌体表面上。
③抗有害物质的损伤作用：处于细菌细胞最外层，荚膜犹如盔甲可有效保护菌体免受或少受多种杀菌、抑菌物质的损伤，如溶菌酶、补体等。
④抗干燥作用：荚膜多糖为高度水合分子，含水量在95%以上，可帮助细菌抵抗干燥对生存的威胁。
⑤当缺乏营养时，荚膜可被利用作碳源和能源，有的荚膜还可作氮源。
颗粒型抗原,除了有细菌、红细胞、螺旋体等天然颗粒型抗原,还有吸附有可溶性抗原的非免疫相关颗粒.
颗粒性抗原光镜下可见，比如细菌性抗原、红细胞抗原等；而可溶性抗原在光镜下不可见，如组织浸出液、细菌毒素、蛋白质分子等。
它们不等同于完全抗原和不完全抗原。完全抗原具有免疫原性和抗原性，而不完全抗原只具有抗原性。完全抗原可以是颗粒性抗原，亦可是可溶性抗原，而不完全抗原一般只能是可溶性抗原，不会是颗粒性抗原。
若已进入细胞内。则先由巨噬细胞吞噬降解。并形成抗原-MHC复合体传送到表面。被辅助性T淋巴细胞识别和效应T淋巴细胞识别后。效应T淋巴细胞被激活。分解靶细胞。然后再由效应B细胞分泌的抗体进一步消灭病毒。
还有不清楚的么？
