- SynonymMAG,Siglec-4a,GMA,S-MAG
- SourceHuman MAG, Fc Tag (MAG-H5254) is expressed from human 293 cells (HEK293). It contains AA Gly 20 - Pro 516 (Accession # P20916-1).Predicted N-terminus: Gly 20Request for sequence
- Molecular Characterization

This protein carries a human IgG1 Fc tag at the C-terminus.
The protein has a calculated MW of 81.1 kDa. The protein migrates as 100-115 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
- EndotoxinLess than 1.0 EU per μg by the LAL method.
- Purity
>95% 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.

Human MAG, Fc Tag on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.
- BackgroundMyelin-associated glycoprotein (MAG), a nervous system cell adhesion molecule, is an I-type lectin that binds to sialylated glycoconjugates, including gangliosides bearing characteristic structural determinants. Preferentially binds to alpha-2,3-linked sialic acid. Binds ganglioside Gt1b. Adhesion molecule that mediates interactions between myelinating cells and neurons by binding to neuronal sialic acid-containing gangliosides and to the glycoproteins RTN4R and RTN4RL2.Protection against apoptosis is probably mediated via interaction with neuronal RTN4R and RTN4RL2.In dorsal root ganglion neurons the inhibition is mediated primarily via binding to neuronal RTN4R or RTN4RL2 and to a lesser degree via binding to neuronal gangliosides. In cerebellar granule cells the inhibition is mediated primarily via binding to neuronal gangliosides. In sensory neurons, inhibition of neurite extension depends only partially on RTN4R, RTN4RL2 and gangliosides.
- References
- (1)Wörter V, et al. PLoS One. 2009. 4(4):e5218.
- (2)Mehta NR, et al. J Biol Chem. 2007. 282(38):27875-86.
- (3)Collins BE, et al. J Biol Chem. 1997. 272(2):1248-55.
Please contact us via TechSupport@acrobiosystems.com if you have any question on this product.
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文章原文链接http://www.jbc.org/content/282/23/16776.long
本试验根据《中国药典》2015年版紫外分光光度法吸收系数法进行制定,本试验方法采用的方法学验证内容如下:
1.线性及范围
取IgG标准品配制5个不同浓度被测样品,并进行测定,绘制标准曲线,得到回归方程及范围。
2.准确度
已回收率对准确度进行验证。以已知含量的IgG标准品配制供试品,配制三个浓度,每个浓度平均测定三次。计算回收率。
3.精密度
IgG标准品配制供试品,平行测定六次。
4.溶液稳定性试验
至少持续2h的溶液稳定性考察。
5.干扰试验
空白溶液中加入辅料,在280nm处测定吸收,确定辅料是否对样品的吸收造成干扰。
以上,请大神指正。
补充问题,在专属性验证上,仅做辅料干扰是不是太少了?是否再进行强降解实验呢?因为其中包含了蛋白质A、外源性DNA及宿主细胞蛋白残留。我是否应该针对这三种杂质进行专属性试验?该如何进行呢?
问题分析:单纯疱疹是由单纯疱疹病毒感染引起的.单纯疱疹病毒最大的特点是,这种病毒很难被“斩尽杀绝”,总有一少部分病毒在体内潜伏下来,伺机作乱.这些病毒何时再次致病很难预料,一般情况下发热,情绪紧张,月经,妊娠等因素都可能引起发病或复发.发病后即使不经治疗,患者2--4周后也可自愈,只是部分病毒仍然潜伏在体内.目前对这种由单纯疱疹病毒引起的疾病,没有很好的药物治疗,发作时主要使用各种洛韦类抗病毒药,如阿昔洛韦等.主要还是要保持良好的情绪,避免劳累等.
指导建议:IGG和IGM是两种不同的免疫球蛋白,两者产生的先后顺序不一样,一般来说IGM阳性提示在急性感染期,IGG阳 性有可能与以前曾经有过感染有关的。aware可自测不用抽血祝您健康天 猫!
2-IgM也是一种特异性感染指标,但在人体内持续时间不长(有时是30天更短),往往是传染病的近期感染指标。呈阴性是指:你近期没有感染过结核杆菌。

