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| 产地 | 进口、国产 |
| 品牌 | 上海莼试 |
| 保存条件 | Store at -20 °C |
| 货号 | CS9995 |
| 应用范围 | WB=1:100-500 ELISA=1:500-1000 IP=1:20-100 IHC-P=1:100-500 IHC-F=1:100-500 Flow-Cyt=1:100-500 ICC=1:100-500 IF=1:100-500 |
| CAS编号 | |
| 抗体名 | Anti-Nicastrin |
| 克隆性 | |
| 靶点 | 详见说明书 |
| 适应物种 | 详见说明书 |
| 形态 | 详见说明书 |
| 宿主 | 详见说明书 |
| 亚型 | IgG |
| 标识物 | 详见说明书 |
| 浓度 | 1mg/1ml% |
| 免疫原 | KLH conjugated synthetic peptide derived from human Nicastrin |
抗体的生物素化标记实验要点:
1. 蛋白APH2抗体品牌 如在反应混合液中有叠氮钠或游离氨基存在,会抑制标记反应。因此,蛋白质在反应前要对 0.1mol/L碳酸氢钠缓冲液或0.5mol/L硼酸缓冲液充分透析;
2.所用的NHSB及待生物素化蛋白质之间的分子比按蛋白质表面的ε-氨基的密度会有所不同,选择不当则影响标记的效率,应先用几个不同的分子比来筛选最适条件;
3.用NHSB量过量也是不利的,抗原的结合位点可能因此被封闭,导致抗体失活;
4.由于抗体的氨基不易接近可能造成生物素化不足,此时可加入去污剂如 Triton x-100, Tween20等;
5.当游离ε-氨基(赖氨酸残基的氨基)存在于抗体的抗原结合位点时,或位于酶的催化位点时,生物素化会降低或损伤抗体蛋白的结合力或活性;
6.生物素还可能与不同的功能基团,如羰基、氨基、巯基、异咪唑基及*基,也可与糖基共价结合;
7.交联反应后,应充分透析,否则,残余的生物素会对生物素化抗体与亲和素的结合产生竞争作用;
8.在细胞的荧光标记实验中,中和亲和素的本底低,但由于链霉亲和素含有少量正电荷,故对某些细胞可导致高本底。
产品订购信息:
英文名称 Anti-Nicastrin
中文名称 蛋白APH2抗体品牌
别 名 Anterior pharynx defective 2; APH 2; APH2; NCSTN; NCT; NICA_HUMAN; Nicastrin.

浓 度 1mg/1ml
规 格 0.1ml/100μg 0.2ml/200μg
抗体来源 Rabbit
克隆类型 polyclonal
交叉反应 Human, Mouse, Rat, Chicken, Pig, Cow, Horse
产品类型 一抗
研究领域 神经生物学 干细胞
蛋白分子量 predicted molecular weight: 75kDa
性 状 Lyophilized or Liquid
免 疫 原 KLH conjugated synthetic peptide derived from human Nicastrin
亚 型 IgG
纯化方法 affinity purified by Protein A
储 存 液 0.01M PBS, pH 7.4 with 10 mg/ml BSA and 0.1% Sodium azide
蛋白APH2抗体品牌 产品应用 WB=1:100-500 ELISA=1:500-1000 IP=1:20-100 IHC-P=1:100-500 IHC-F=1:100-500 Flow-Cyt=1:100-500 ICC=1:100-500 IF=1:100-500
(石蜡切片需做抗原修复)
not yet tested in other applications.
optimal dilutions/concentrations should be determined by the end user.
保存条件 Store at -20 °C for one year. Avoid repeated freeze/thaw cycles. The lyophilized antibody is stable at room temperature for at least one month and for greater than a year when kept at -20°C. When reconstituted in sterile pH 7.4 0.01M PBS or diluent of antibody the antibody is stable for at least two weeks at 2-4 °C.
Important Note This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications.
产品介绍 The Presenilin 1 (PS1) and Presenilin 2 (PS2) transmembrane proteins are components of high molecular weight complexes. These complexes mediate proteolytic cleavage within the transmembrane domain of several proteins, including the ∫-Amyloid precursor protein (∫APP) and Notch. Missense mutations in the genes encoding the Presenilin proteins increase the proteolysis of ∫APP and results in the overproduction of the neurotoxic ∫-Amyloid peptide, which results in a condition associated with Familial Alzheimer’s disease (FAD). A novel component of the presenilin complex, nicastrin, is a type I transmembrane glycoprotein that is involved in mediating Notch/GLP-1 signaling. In addition, nicastrin contributes to the processing of ∫APP, which makes nicastrin an attractive potential target for modulating the production of ∫-Amyloid in patients with Alzheimer’s disease. Originally purified from immunoprecipitated PS1 complexes from HEK293 cells, nicastrin contains hydrophilic amino and carboxy-terminal domains, a short, hydrophobic transmembrane domain and potential N-myristoylation and phosphorylation sites.
Function : Essential subunit of the gamma-secretase complex, an endoprotease complex that catalyzes the intramembrane cleavage of integral membrane proteins such as Notch receptors and APP (beta-amyloid precursor protein). It probably represents a stabilizing cofactor required for the assembly of the gamma-secretase complex.Subunit : Belongs to the nicastrin family.Subcellular Location : Membrane. Melanosome. Identified by mass spectrometry in melanosome fractions from stage I to stage IV.Tissue Specificity : Widely expressed.DISEASE : Defects in NCSTN are the cause of familial acne inversa type 1 (ACNINV1) [MIM:142690]. A chronic relapsing inflammatory disease of the hair follicles characterized by recurrent draining sinuses, painful skin abscesses, and disfiguring scars. Manifestations typically appear after puberty.Similarity : Belongs to the nicastrin family.

抗体的鉴定:
1)蛋白APH2抗体品牌 抗体的效价鉴定:不管是用于诊断还是用于,制备抗体的目的都是要求较高效价。不同的抗原制备的抗体,要求的效价不一。鉴定效价的方法很多,包括有试管凝集反应,琼脂扩散试验,酶联免疫吸附试验等。常用的抗原所制备的抗体一般都有约成的鉴定效价的方法,以资比较。如制备抗抗体的效价,一般就采用琼脂扩散试验来鉴定。
2)抗体的特异性鉴定:抗体的特异性是指与相应抗原或近似抗原物质的识别能力。抗体的特异性高,它的识别能力就强。衡量特异性通常以交叉反应率来表示。交叉反应率可用竞争抑制试验测定。以不同浓度抗原和近似抗原分别做竞争抑制曲线,计算各自的结合率,求出各自在IC50时的浓度,并按公式计算交叉反应率。
如果所用抗原浓度IC50浓度为pg/管,而一些近似抗原物质的IC50浓度几乎是无穷大时,表示这一抗血清与其他抗原物质的交叉反应率近似为0,即该血清的特异性较好。
3)抗体亲和力:是指抗体和抗原结合的牢固程度。亲和力的高低是由抗原分子的大小,抗体分子的结合位点与抗原决定簇之间立体构型的合适度决定的。有助于维持抗原抗体复合物稳定的分子间力有氢键,疏水键,侧链相反电荷基因的库仑力,范德华力和空间斥力。亲和力常以亲和常数K表示,K的单位是L/mol。抗体亲和力的测定对抗体的筛选,确定抗体的用途,验证抗体的均一性等均有重要意义。

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