?Recombinant protein G
重組蛋白G
| 英文名稱 | Recombinant protein G |
| 中文名稱 | 重組蛋白G |
| 別????名 | reProtein G; Protein G recombinant; Immunoglobulin G-binding protein G; IgG-binding protein G; SPG1_STRSG?? |
| 檢測分子量 | 22.0 |
| 性????狀 | Lyophilized or Liquid |
| 濃????度 | >0.5 mg/ml |
| 物????種 | Streptococcus |
| 序????列 | N/A |
| 純????度 | >90% as determined by SDS-PAGE |
| 純化方法 | AC |
| 內毒素 | Not analyzed |
| 表達系統 | E.coli |
| 活性 | Yes |
| 標簽 | Tag free |
| 緩?沖?液 | Lyophilized powder |
| 保存條件 | Stored at -70℃ or -20℃. Avoid repeated freeze/thaw cycles. |
| 注意事項 | This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications. |
| 產品介紹 | Protein G is an immunoglobulin-binding protein expressed in group C and G Streptococcal bacteria much like Protein A but with differing specificities. It is a 65-kDa (G148 protein G) and a 58 kDa (C40 protein G)[1] cell surface protein that has found application in purifying antibodies through its binding to the Fc region. The native molecule also binds albumin, however, because serum albumin is a major contaminant of antibody sources, the albumin binding site has been removed from recombinant forms of Protein G. Recombinant protein G has a very high affinity for the Fc regions of IgG molecules. Immoblisation of protein G on beads creates an affinity resin which can be used to purify IgG fractions from crude serum, ascites fluid or cell cuture media. Recomb Protein G 蛋白G是從G類Streptococci細菌中分離出來的胞壁蛋白,與多數哺乳動物的IgG Fc段結合(包括:人、山羊、綿羊、兔、豚鼠、馬、豬、猴、小鼠等),分子量:22kDa。不與狗IgG結合、不結合人IgM、IgD、和IgA。 重組蛋白G(Recomb Protein G)已經除去了與白蛋白及細胞表面結合位點,減少了交叉反應和非特異性結合。因此,它比天然蛋白G和蛋白A有更大的親和力??梢源娑?,廣泛應用于免疫化學等領域。在親和力、穩定性等方面好。 蛋白A是從非致病性Bacillus中獲取的通過基因工程生產的重組蛋白,其性質和重組蛋白G相似。 蛋白A、蛋白G的主要應用是在: 1、純化抗體: 將這些蛋白偶聯于支持物上,提供了純化抗體的有效方法。 2、免疫沉淀(immunoprecipitation): 利用蛋白A、蛋白G和免疫球蛋白的Fc段的結合,把Ag-Ab復合物分離出來,從而達到從蛋白復合物中分離出特定蛋白,進行下一步的研究分析或者研究蛋白質-蛋白質之間的相互作用。 3、去除或減少非特異性背景: 如免疫沉淀技術中在加入特異性抗體前加protein A/G beads到細胞裂解液中,以減低背景。 蛋白A、蛋白G與不同的免疫球蛋白的結合能力并不一樣,它們受到后者的來源及亞類的影響 |
本產品僅供科研使用.請勿用于醫藥,不能用于臨床治療診斷使用!
