抗體的生物素化標(biāo)記實(shí)驗(yàn)要點(diǎn)：

1. PEG3蛋白抗體品牌 如在反應(yīng)混合液中有疊氮鈉或游離氨基存在,會(huì)抑制標(biāo)記反應(yīng)。因此,蛋白質(zhì)在反應(yīng)前要對(duì) 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(huì)有所不同,選擇不當(dāng)則影響標(biāo)記的效率,應(yīng)先用幾個(gè)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(diǎn)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(shí)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(diǎn)時(shí),或位于酶的催化位點(diǎn)時(shí),生物素化會(huì)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(tuán),如羰基、氨基、巰基、異咪唑基及苯酚基,也可與糖基共價(jià)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(huì)對(duì)生物素化抗體與親和素的結(jié)合產(chǎn)生競(jìng)爭(zhēng)作用；

8.在細(xì)胞的熒光標(biāo)記實(shí)驗(yàn)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(duì)某些細(xì)胞可導(dǎo)致高本底。

產(chǎn)品訂購(gòu)信息：
英文名稱  Anti-PEG3 

中文名稱   PEG3蛋白抗體品牌 

別    名  Paternally-expressed gene 3 protein; Zinc finger and SCAN domain-containing protein 24; Kruppel-type zinc finger protein; paternally expressed 3; Paternally expressed gene 3; PEG3 protein; Pw1; Zn-finger protein Pw1.

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, Cow, Horse 

產(chǎn)品類型   一抗  

研究領(lǐng)域     細(xì)胞生物 神經(jīng)生物學(xué) 信號(hào)轉(zhuǎn)導(dǎo) 細(xì)胞周期蛋白 轉(zhuǎn)錄調(diào)節(jié)因子

蛋白分子量  predicted molecular weight: 175kDa

性    狀   Lyophilized or Liquid

免 疫 原 KLH conjugated synthetic peptide derived from human PEG3 (1535-1588aa) 

亞    型   IgG

純化方法   affinity purified by Protein A

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

PEG3蛋白抗體品牌 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 In human, ZIM2 and PEG3 are treated as two distinct genes though they share multiple 5' exons and a common promoter and both genes are paternally expressed (PMID:15203203). Alternative splicing events connect their shared 5' exons either with the remaining 4 exons unique to ZIM2, or with the remaining 2 exons unique to PEG3. In contrast, in other mammals ZIM2 does not undergo imprinting and, in mouse, cow, and likely other mammals as well, the ZIM2 and PEG3 genes do not share exons. Human PEG3 protein belongs to the Kruppel C2H2-type zinc finger protein family. PEG3 may play a role in cell proliferation and p53-mediated apoptosis. PEG3 has also shown tumor suppressor activity and tumorigenesis in glioma and ovarian cells. Alternative splicing of this PEG3 gene results in multiple transcript variants encoding distinct isoforms.

Function : Induces apoptosis in cooperation with SIAH1A. Acts as a mediator between p53/TP53 and BAX in a neuronal death pathway that is activated by DNA damage. Acts synergistically with TRAF2 and inhibits TNF induced apoptosis through activation of NF-kappa-B. Possesses a tumor suppressing activity in glioma cells.

Subunit : Homodimer. Interacts with SIAH1A and SIAH2. Interacts with TRAF2.

Subcellular Location : Nucleus. Cytoplasm.

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

Contains 12 C2H2-type zinc fingers.

Contains 1 SCAN box domain.

PEG3蛋白是一種轉(zhuǎn)錄因子。在*、腦組織、胎盤、卵巢、睪丸等組織中表達(dá)，PEG3蛋白位于細(xì)胞核內(nèi)。PEG3也是一個(gè)凋亡促進(jìn)因子并可能參與調(diào)節(jié)(TNF)信號(hào)傳導(dǎo)通路。

抗體的鑒定：

1）PEG3蛋白抗體品牌 抗體的效價(jià)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(jià)。不同的抗原制備的抗體,要求的效價(jià)不一。鑒定效價(jià)的方法很多,包括有試管凝集反應(yīng),瓊脂擴(kuò)散試驗(yàn),酶聯(lián)免疫吸附試驗(yàn)等。常用的抗原所制備的抗體一般都有約成的鑒定效價(jià)的方法,以資比較。如制備抗抗體的效價(jià),一般就采用瓊脂擴(kuò)散試驗(yàn)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(shí)別能力。抗體的特異性高,它的識(shí)別能力就強(qiáng)。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(jìng)爭(zhēng)抑制試驗(yàn)測(cè)定。以不同濃度抗原和近似抗原分別做競(jìng)爭(zhēng)抑制曲線,計(jì)算各自的結(jié)合率,求出各自在IC50時(shí)的濃度,并按公式計(jì)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(shí),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(diǎn)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(kù)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(cè)定對(duì)抗體的篩選,確定抗體的用途,驗(yàn)證抗體的均一性等均有重要意義。

Anti-phospho-Arhgef2 (Ser810)/FITC 熒光素標(biāo)記抗人、大、小鼠磷酸化Rho鳥苷酸交換因子2抗體IgGMulti-class antibodies規(guī)格： 0.2ml

Anti-NTCP/FITC 熒光素標(biāo)記離子/磺膽酸共轉(zhuǎn)運(yùn)蛋白IgGMulti-class antibodies規(guī)格： 0.2ml

Rhesus antibody Rh BMP7 骨形態(tài)發(fā)生蛋白7抗體 規(guī)格 0.1ml

Ang- II (Angiotensin II ) 緊張素II抗原 0.5mg

HSP90 beta 英文名稱： 熱休克蛋白90β/HSP90 β 抗體 0.1ml

Rhesus antibody Rh RECK 金屬蛋白酶抑制因子RECK抗體 規(guī)格 0.2ml

Anti-NTCP/FITC 熒光素標(biāo)記離子/磺膽酸共轉(zhuǎn)運(yùn)蛋白IgGMulti-class antibodies規(guī)格： 0.2ml

(CTX- I )ELISA Kit 大鼠Ⅰ型膠原C端肽Multi-class antibodies規(guī)格： 48T

Anti-Phospho-Syk (Ty*3) 磷酸化非受體型酪氨酸蛋白激酶抗體Multi-class antibodies規(guī)格： 0.1ml

Rhesus antibody Rh Goat Anti-Guinea pig IgG/HRP 辣根過氧化物酶標(biāo)記的羊抗豚鼠IgG 規(guī)格 0.1ml

TSA(Human tumor specific antigen) ELISA Kit 人特異性抗原 96T

NME4 英文名稱： 轉(zhuǎn)移抑制基因H4抗體 0.2ml

Bcl2L2 英文名稱： Bcl-2樣蛋白2抗體 0.1ml

Anti-Phospho-Syk (Ty*3) 磷酸化非受體型酪氨酸蛋白激酶抗體Multi-class antibodies規(guī)格： 0.1ml

Human Beta-lactamase ELISA Kit 人β內(nèi)酰胺酶Multi-class antibodies規(guī)格： 48T

Anti-Substance P Receptor P物質(zhì)受體抗體Multi-class antibodies規(guī)格： 0.1ml

Rhesus antibody Rh IL-14/Taxilin alpha 白介素14抗體 規(guī)格 0.1ml

NAG ELISA Kit 大鼠N-乙酰-β-D-基葡萄糖苷酶 96T

Phospho-PDGF Receptor beta (Tyr579) 英文名稱： 磷酸化血小板源性生長(zhǎng)因子受體B抗體 0.1ml

CD171 英文名稱： 神經(jīng)細(xì)胞粘附分子配體1抗體 0.1ml

Anti-Substance P Receptor P物質(zhì)受體抗體Multi-class antibodies規(guī)格： 0.1ml

CL-0269CW-2(人細(xì)胞)5×106cells/瓶×2

RK1 Others Mouse 小鼠 kA / RK1 人細(xì)胞裂解液 (陽(yáng)性對(duì)照)

人心肌細(xì)胞cDNAHCM cDNA

MX-1細(xì)胞，人癌細(xì)胞 豬腎細(xì)胞系,PK-15細(xì)胞 大隱平滑肌細(xì)胞Many types of cells包裝：5 × 105次方(1ml)

VE(人內(nèi)皮細(xì)胞) 5×106cells/瓶×2

HUtMEC Pellet 人子宮微內(nèi)皮細(xì)胞團(tuán)塊 > 1 mio.cells 肌細(xì)胞分離液MDS

CL-0267CNE-2Z(人細(xì)胞)5×106cells/瓶×2

PPT1 Others Human 人 PPT1 / Palmitoyl-protein thioesterase 1 人細(xì)胞裂解液 (陽(yáng)性對(duì)照)

人主動(dòng)脈內(nèi)皮細(xì)胞cDNAHAEC cDNA

豬腎傳代細(xì)胞;IBRS-2 人B淋巴母細(xì)胞，HMy2.CIR細(xì)胞 LⅡ細(xì)胞，KM小鼠網(wǎng)織細(xì)胞瘤株

穩(wěn)定表達(dá)EBNA1的人胚腎細(xì)胞;293E

HA Others H5N1 甲型 H5N1 (A/Egypt/2321-NAMRU3/2007) 血凝素HA1 (Hemagglutinin) 人細(xì)胞裂解液 (陽(yáng)性對(duì)照)

PEG3蛋白抗體品牌 EPHA2 Others Human 人 EphA2 人細(xì)胞裂解液 (陽(yáng)性對(duì)照)

Ca Ski, 人細(xì)胞

人胚腎細(xì)胞-F克隆;293F

HK-2C細(xì)胞，人胚腎上皮細(xì)胞 貂肺上皮細(xì)胞,Mv.1.Lu(NBL-7)細(xì)胞 CL-0365HuTu-80(人十二脂腸腺癌)5×106cells/瓶×2

BE(2)-M17(人神經(jīng)母細(xì)胞瘤細(xì)胞) 5×106cells/瓶×2

HOB-c 人成骨細(xì)胞(HOB) 500,000cells 人真皮成纖維母細(xì)胞-新生HDF-n