低豐度磷酸化蛋白的檢測(cè)
STAT3是一種轉(zhuǎn)錄活化因子,參與黑色素瘤的發(fā)生發(fā)展和宿主免疫。通過(guò)對(duì)細(xì)胞添加某種細(xì)胞因子如IFNa進(jìn)行處理可使蛋白上某個(gè)特異地酪氨酸殘基發(fā)生磷酸化活化。
對(duì)起始量為12.5 μg IFNa處理的Hela細(xì)胞總蛋白進(jìn)行兩倍梯度稀釋,經(jīng)過(guò)聚丙烯酰胺凝膠分離并印記在AmershamHybond-P膜上。通過(guò)特異的抗體和ECL prime對(duì)磷酸化的STAT3進(jìn)行檢測(cè)(圖8)。
樣品: 對(duì)12.5 μg的IFNa處理的Hela細(xì)胞裂解物總蛋白進(jìn)行2倍梯度稀釋
膜: Amersham Hybond-P
封閉: 5%牛血清白蛋白,溶解在PBS-T溶液中
一抗: 小鼠抗pSTAT3(Tyr705)(1:3000)
二抗: HRP偶聯(lián)的抗小鼠IgG(1:30000)
檢測(cè): Amersham ECL prime/ Amersham ECL plus
成像: ImageQuant LAS 4000 mini(5分鐘) |
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圖8. 使用ECL prime和ECL plus對(duì)IFNa處理的Hela細(xì)胞中的pSTAT3進(jìn)行免疫印跡檢測(cè)。與ECL plus相比,ECL prime能產(chǎn)生更高強(qiáng)度的信號(hào),這使得蛋白檢測(cè)的質(zhì)量即靈敏度得到改善。對(duì)照條帶為6.25 μg非處理細(xì)胞總蛋白。
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訂購(gòu)信息 |
Product |
Code no. |
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Amersham ECL Prime Western Blotting Detection Reagents for 1000 cm2 membrane1 |
RPN2232 |
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1 Includes Solution A (luminol solution, 50 ml) and Solution B (peroxide solution, 50 ml),
sufficient for 1000 cm2 membrane. |
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For a more comprehensive list of related products,please refer to www.gelifesciences.com/ecl. |
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Code no. |
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Amersham Hybond-P (20 × 20 cm), 10 sheets |
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(from sheep), 1 ml |
NA931-1ML |
ECL Rabbit IgG, HRP-Linked Whole Ab (from donkey), 1 ml |
NA934-1ML |
Full-Range Rainbow Molecular Weight
Markers 250 l |
RPN800E |
ECL DualVue Western Blotting Markers (25 loadings) |
RP N810 |
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Imaging systems |
Code no. |
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ImageQuant LAS 4000 |
28-9558-10 |
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Software and accessories |
Code no. |
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ImageQuant TL 7.0 and IQTL SecurITy 8.0 Software packages
(with Getting Started guide) |
28-9380-94 |
ImageQuant TL 7.01and ImageQuant TL SecurITy 8.0 (single user) |
28-9332-73 |
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