抗体的生物素化标记实验要点：

1. 锌指转录因子Slug抗体说明书 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、异咪唑基及苯酚基,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-SNAI2/SLUG 

中文名称   锌指转录因子Slug抗体说明书 

别    名  Neural crest transcription factor Slug; Protein snail homolog 2; Slug (chicken homolog) zinc finger protein; Slug homolog zinc finger protein; Slug zinc finger protein; SLUGH 1; SLUGH; SLUGH1; SNAI 2; SNAI2; SNAI-2; SNAI2_HUMAN; Snail 2; Snail homolog 2; Snail2; Snail-2; WS 2D; WS2D; Zinc finger protein SLUG; Zinc finger protein SNAI2.

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, Dog, Pig, Cow, Rabbit 

产品类型   一抗  

研究领域     免疫学 神经生物学 信号转导 转录调节因子

蛋白分子量  predicted molecular weight: 30kDa

性    状   Lyophilized or Liquid

免 疫 原 KLH conjugated synthetic peptide derived from human Slug N-terminus 

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

锌指转录因子Slug抗体说明书 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 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 This gene encodes a member of the Snail family of C2H2-type zinc finger transcription factors. The encoded protein acts as a transcriptional repressor that binds to E-box motifs and is also likely to repress E-cadherin transcription in breast carcinoma. This protein is involved in epithelial-mesenchymal transitions and has antiapoptotic activity. Mutations in this gene may be associated with sporatic cases of neural tube defects. [provided by RefSeq, Jul 2008].

Function : Transcriptional repressor. Involved in the generation and migration of neural crest cells. Plays a role in mediating RAF1-induced transcriptional repression of the TJ protein, occluding (OCLN) and subsequent oncogenic transformation of epithelial cells.

Subunit : Interacts (via SNAG domain) with LIMD1 (via LIM domains), WTIP (via LIM domains) and AJUBA (via LIM domains).

Subcellular Location : Nucleus.

Tissue Specificity : Expressed in placenta and adult heart, pancreas, liver, kidney and skeletal muscle.

DISEASE : Defects in SNAI2 are the cause of Waardenburg syndrome type 2D (WS2D) . WS2 is a genetically heterogeneous, autosomal dominant disorder characterized by sensorineural deafness, pigmentary disturbances, and absence of dystopia canthorum. The frequency of deafness is higher in WS2 than in WS1

Similarity : Belongs to the snail C2H2-type zinc-finger protein family.

Contains 5 C2H2-type zinc fingers.

Database links : UniProtKB/Swiss-Prot: O43623.1

转录调节因子（Transcriptin Regulators）

锌指转录因子Slug主要用于转移方面的研究。

抗体的鉴定：

1）锌指转录因子Slug抗体说明书 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。

改良山梨醇麦康凯琼脂基础(CT-SMAC)2550g用于大肠埃希氏菌07/NM的选择性分离培养(GB/T4789.36-2008)。

Peptone-D (Protease peptone) 蛋白胨 D 100g incubation media Peptone-D (Protease peptone) 蛋白胨 D 100g

谢氏杆菌 支/瓶

葡萄糖琼脂250g用于细菌的综合生化试验

精氨酸肉汤 250g 用于游泳池中假单胞菌检测(Merck方法)

改良纤维二糖多粘菌素B多粘菌素E(mCPC)琼脂基础冻干配套试剂SR0260支添加于50ml025纤维二糖多粘菌素B多粘菌素E(mCPC)琼脂基础。

LB Lennox Broth 培养基 250g incubation media LB Lennox Broth 培养基 250g

烟曲霉 支/瓶

桔汁琼脂250g用于饮料中耐酸细菌的分离培养

溶血(0.1%)赫氏琼脂 250g 用于菌分离培养

3%酶试剂2ml*20支用于细菌的酶试验

MRS琼脂 MRS Agar Base 用于食品中乳酸菌总数测定

XLD琼脂培养基 Xylose Lysine Desoxycholate Medium 100克 分离志贺氏菌属和沙门氏菌

胰蛋白胨琼脂培养基250g/瓶用于布鲁氏菌属检验incubationmedia胰蛋白胨琼脂培养基250g/瓶用于布鲁氏菌属检验

BileEsculinAgar

CL-0170NG108-15(小鼠神经细胞瘤与大鼠神经之融合细胞)5×106cells/瓶×2

RSPO1 Others Mouse 小鼠 R-Spondin 1 / RSPO1 CHO细胞裂解液 (阳性对照)

人虹膜色素上皮细胞裂解物HIPEpiCL

小耳猪肺细胞;SEP-L2 大细胞细胞，NCI-H661细胞 DSL-6A/C1细胞，大鼠*癌细胞株

人整合SV40基因的上皮细胞;HBL-100 [HBL100]

HA Others H1N1 甲型 H1N1 (A/Ohio/UR06-0091/2007) 血凝素HA1 (Hemagglutinin) 人细胞裂解液 (阳性对照)

锌指转录因子Slug抗体说明书CL-0168Neuro-2a/N2a(小鼠脑神经瘤细胞)5×106cells/瓶×2

GSK3B Others Human 人 GSK3B 杆状病毒-昆虫细胞裂解液 (阳性对照)

人视网膜色素上皮细胞裂解物HRPEpiCL

NCI-H1755[H1755]细胞，人细胞 人胚,HELF细胞 卵巢上皮细胞Many types of cells包装：5 × 105次方(1ml)

兔主动脉平滑肌细胞;SMC

TIMP2 Others Human 人 TIMP2 / TIMP-2 人细胞裂解液 (阳性对照)