6種可應用於蛋白質純化之緩衝劑簡介

為什麼要進行蛋白質純化?
蛋白質純化在生物化學領域中極具研究價值!研究專家能透過純化的目標蛋白質來分析蛋白質結構、觀測酶的活性、剖析基因問題,以及研究細菌細胞的抗體用以製作抗生素等。[1]
可用於蛋白質純化的生物緩衝劑推薦
在不干擾蛋白質活性的前提下,觀測目標的種類與使用的純化方式,都會影響緩衝劑的選擇。因此在進行蛋白質純化前,要先確定純化的方式、欲測定的細胞樣本,以及您想要得到的最終結果,再依據上述變項來判定並採用合適的緩衝劑。[2][3].以下為您推薦6種常用於蛋白質純化的生物緩衝劑:
1) BIS-TRIS
CAS No.: 6976-37-0適用pH值: 5.8 - 7.2
應用內容:
◆可用於各種類型的電泳
◆與ACES緩衝劑一起作為膠體電泳(BIS-TRIS / ACES)的跑膠緩衝液。
◆研究報告指出BIS-TRIS也能用於陰離子交換層析法、核磁共振光譜儀(nuclear magnetic resonance spectroscopy, NMR)以及X光晶體學(X-ray crystallography)中。
◆被認為是高毒性緩沖劑:二甲基胂酸(Cacodylate)的絕佳替代品。
◆它不適用於蛋白質定量分析(bicinchoninic acid, BCA)。
◆它會與人類肝臟的脂肪酸結合蛋白(fatty-acid-binding, FAB)產生相互作用並干擾蛋白質動力學。
了解更多關於Hopax BIS-TRISFurther reading:The uses of Bis-Tris Buffer - A starting guide
2) MOPS
CAS No.: 1132-61-2適用pH值: 6.5 - 7.9
應用內容:
◆可應用於層析法
◆它會與牛血清白蛋白(Bovine Serum Albumin, BSA)的肽主鏈相互作用,影響蛋白質的穩定性
了解更多關於Hopax MOPSFurther reading:為什麼使用MOPS?
3) PIPES
CAS No.: 5625-37-6適用pH值: 6.1 - 7.5
應用內容:
◆可應用於層析法
◆與MES緩衝劑和MOPS緩衝劑相似,這種緩衝劑缺乏與大多數金屬離子形成螯合物的能力,可在金屬離子溶液中作為非配位緩衝劑。
了解更多關於Hopax PIPESFurther reading:為什麼使用 PIPES Buffer
4) TES
CAS No.: 7365-44-8適用pH值: 6.8 - 8.2
應用內容:
◆作為酶測定緩衝液。
◆可應用於凝膠過濾與親和層析。
了解更多關於Hopax TES
5) TRIS
CAS No.: 77-86-1適用pH值: 7.2 - 9.0
應用內容:
◆可應用於離子交換法。
◆通常用於製備Laemmli緩衝液,用於十二烷基硫酸鈉聚丙烯醯胺凝膠電泳(sodium dodecyl sulfate polyacrylamide gel electrophoresis, SDS-PAGE)中蛋白質樣本的變性和上樣
◆它可能會干擾布拉德福蛋白質定量法(Bradford protein assay)
‧◆不適用於蛋白質定量分析(bicinchoninic acid, BCA)。
了解更多關於Hopax TRISFurther reading:The uses of Tris buffer - A starting guide
6) TRIS-HCL
CAS No.: 1185-53-1適用pH值: 7.2 - 9.0
應用內容:
◆可應用於鹽析法中的分離與透析溶液
◆可應用於離子交換法中的上樣
◆可應用於親合層析法中的底物溶液
◆用於十二烷基硫酸鈉聚丙烯醯胺凝膠電泳(sodium dodecyl sulfate polyacrylamide gel electrophoresis, SDS-PAGE)中的洗滌劑
了解更多關於Hopax TRIS-HCL
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參考文獻:
1 Studying Proteins and Protein Purification
2 Protein Lysate TLC: Pro-Tips to Keep Your Protein Extracts in (Experimentally) Perfect Shape.
3 How to choose the perfect buffer to get a pure, stabilised, functional protein
4 Purification and biochemical characterization of a novel thermostable serine alkaline protease from Aeribacillus pallidus C10: a potential additive for detergents Vildan Yildirim, a Mustafa Ozkan Baltaci, a Ilknur Ozgencli, b Melda Sisecioglu, a Ahmet Adiguzel, a and Gulsah Adiguzel c
5 Native RNA purification by gel filtration chromatography.
6 Protein Stability, M. Michael Gromiha, in Protein Bioinformatics, 2010
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