抗體的生物素化標記實驗要點：

1. 鋅指轉(zhuǎn)錄因子Slug抗體說明書 如在反應(yīng)混合液中有疊氮鈉或游離氨基存在,會抑制標記反應(yīng)。因此,蛋白質(zhì)在反應(yīng)前要對 0.1mol/L碳酸氫鈉緩沖液或0.5mol/L硼酸緩沖液充分透析；

2.所用的NHSB及待生物素化蛋白質(zhì)之間的分子比按蛋白質(zhì)表面的ε-氨基的密度會有所不同,選擇不當(dāng)則影響標記的效率,應(yīng)先用幾個不同的分子比來篩選最適條件；

3.用NHSB量過量也是不利的,抗原的結(jié)合位點可能因此被封閉,導(dǎo)致抗體失活；

4.由于抗體的氨基不易接近可能造成生物素化不足,此時可加入去污劑如 Triton x-100, Tween20等；

5.當(dāng)游離ε-氨基(賴氨酸殘基的氨基)存在于抗體的抗原結(jié)合位點時,或位于酶的催化位點時,生物素化會降低或損傷抗體蛋白的結(jié)合力或活性；

6.生物素還可能與不同的功能基團,如羰基、氨基、巰基、異咪唑基及苯酚基,也可與糖基共價結(jié)合；

7.交聯(lián)反應(yīng)后,應(yīng)充分透析,否則,殘余的生物素會對生物素化抗體與親和素的結(jié)合產(chǎn)生競爭作用；

8.在細胞的熒光標記實驗中,中和親和素的本底低,但由于鏈霉親和素含有少量正電荷,故對某些細胞可導(dǎo)致高本底。

產(chǎn)品訂購信息：
英文名稱  Anti-SNAI2/SLUG 

中文名稱   鋅指轉(zhuǎn)錄因子Slug抗體說明書 

別    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.

濃    度   1mg/1ml

規(guī) 格  0.1ml/100μg 0.2ml/200μg

抗體來源   Rabbit

克隆類型   polyclonal

交叉反應(yīng)   Human, Mouse, Rat, Chicken, Dog, Pig, Cow, Rabbit 

產(chǎn)品類型   一抗  

研究領(lǐng)域     免疫學(xué) 神經(jīng)生物學(xué) 信號轉(zhuǎn)導(dǎo) 轉(zhuǎn)錄調(diào)節(jié)因子

蛋白分子量  predicted molecular weight: 30kDa

性    狀   Lyophilized or Liquid

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

亞    型   IgG

純化方法   affinity purified by Protein A

儲 存 液   0.01M PBS, pH 7.4 with 10 mg/ml BSA and 0.1% Sodium azide

鋅指轉(zhuǎn)錄因子Slug抗體說明書 產(chǎn)品應(yīng)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

（石蠟切片需做抗原修復(fù)） 

 not yet tested in other applications.

 optimal dilutions/concentrations should be determined by the end user.  

保存條件  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. 

產(chǎn)品介紹 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

轉(zhuǎn)錄調(diào)節(jié)因子（Transcriptin Regulators）

鋅指轉(zhuǎn)錄因子Slug主要用于轉(zhuǎn)移方面的研究。

抗體的鑒定：

1）鋅指轉(zhuǎn)錄因子Slug抗體說明書 抗體的效價鑒定：不管是用于診斷還是用于,制備抗體的目的都是要求較高效價。不同的抗原制備的抗體,要求的效價不一。鑒定效價的方法很多,包括有試管凝集反應(yīng),瓊脂擴散試驗,酶聯(lián)免疫吸附試驗等。常用的抗原所制備的抗體一般都有約成的鑒定效價的方法,以資比較。如制備抗抗體的效價,一般就采用瓊脂擴散試驗來鑒定。

2）抗體的特異性鑒定：抗體的特異性是指與相應(yīng)抗原或近似抗原物質(zhì)的識別能力?？贵w的特異性高,它的識別能力就強。衡量特異性通常以交叉反應(yīng)率來表示。交叉反應(yīng)率可用競爭抑制試驗測定。以不同濃度抗原和近似抗原分別做競爭抑制曲線,計算各自的結(jié)合率,求出各自在IC50時的濃度,并按公式計算交叉反應(yīng)率。 

如果所用抗原濃度IC50濃度為pg/管,而一些近似抗原物質(zhì)的IC50濃度幾乎是無窮大時,表示這一抗血清與其他抗原物質(zhì)的交叉反應(yīng)率近似為0,即該血清的特異性較好。

3）抗體親和力：是指抗體和抗原結(jié)合的牢固程度。親和力的高低是由抗原分子的大小,抗體分子的結(jié)合位點與抗原決定簇之間立體構(gòu)型的合適度決定的。有助于維持抗原抗體復(fù)合物穩(wěn)定的分子間力有氫鍵,疏水鍵,側(cè)鏈相反電荷基因的庫侖力,范德華力和空間斥力。親和力常以親和常數(shù)K表示,K的單位是L/mol?？贵w親和力的測定對抗體的篩選,確定抗體的用途,驗證抗體的均一性等均有重要意義。

改良山梨醇麥康凱瓊脂基礎(chǔ)(CT-SMAC)2550g用于大腸埃希氏菌07/NM的選擇性分離培養(yǎng)(GB/T4789.36-2008)。

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

謝氏桿菌 支/瓶

葡萄糖瓊脂250g用于細菌的綜合生化試驗

精氨酸肉湯 250g 用于游泳池中假單胞菌檢測(Merck方法)

改良纖維二糖多粘菌素B多粘菌素E(mCPC)瓊脂基礎(chǔ)凍干配套試劑SR0260支添加于50ml025纖維二糖多粘菌素B多粘菌素E(mCPC)瓊脂基礎(chǔ)。

LB Lennox Broth 培養(yǎng)基 250g incubation media LB Lennox Broth 培養(yǎng)基 250g

煙曲霉 支/瓶

桔汁瓊脂250g用于飲料中耐酸細菌的分離培養(yǎng)

溶血(0.1%)赫氏瓊脂 250g 用于菌分離培養(yǎng)

3%酶試劑2ml*20支用于細菌的酶試驗

MRS瓊脂 MRS Agar Base 用于食品中乳酸菌總數(shù)測定

XLD瓊脂培養(yǎng)基 Xylose Lysine Desoxycholate Medium 100克 分離志賀氏菌屬和沙門氏菌

胰蛋白胨瓊脂培養(yǎng)基250g/瓶用于布魯氏菌屬檢驗incubationmedia胰蛋白胨瓊脂培養(yǎng)基250g/瓶用于布魯氏菌屬檢驗

BileEsculinAgar

CL-0170NG108-15(小鼠神經(jīng)細胞瘤與大鼠神經(jīng)之融合細胞)5×106cells/瓶×2

RSPO1 Others Mouse 小鼠 R-Spondin 1 / RSPO1 CHO細胞裂解液 (陽性對照)

人虹膜色素上皮細胞裂解物HIPEpiCL

小耳豬肺細胞;SEP-L2 大細胞細胞，NCI-H661細胞 DSL-6A/C1細胞，大鼠*癌細胞株

人整合SV40基因的上皮細胞;HBL-100 [HBL100]

HA Others H1N1 甲型 H1N1 (A/Ohio/UR06-0091/2007) 血凝素HA1 (Hemagglutinin) 人細胞裂解液 (陽性對照)

鋅指轉(zhuǎn)錄因子Slug抗體說明書CL-0168Neuro-2a/N2a(小鼠腦神經(jīng)瘤細胞)5×106cells/瓶×2

GSK3B Others Human 人 GSK3B 桿狀病毒-昆蟲細胞裂解液 (陽性對照)

人視網(wǎng)膜色素上皮細胞裂解物HRPEpiCL

NCI-H1755[H1755]細胞，人細胞 人胚,HELF細胞 卵巢上皮細胞Many types of cells包裝：5 × 105次方(1ml)

兔主動脈平滑肌細胞;SMC

TIMP2 Others Human 人 TIMP2 / TIMP-2 人細胞裂解液 (陽性對照)