沉淀蛋白质得常用方法(T C A、乙醇、丙酮沉淀蛋白操作步骤)T C A-DOC F o r pre c ipita t i o n o f v er y l o wp rotein c o n c e ntrat i on 1)To on e vo l u m e of prote in so lu tio n, a d d 1/10 0vol、 of 2% DOC (Na deoxyc h o l ate, d e tergen t)、 2) Vor t ex an d le t sit f o r 3 0 min a t 4o C、 ﻫ3) A dd 1/10 o f Trichl o roaceti c acid (T C A) 100% vort e x and l et sit ON a t4oC (pre par a t i on of 1 0 0% T C A: 454 m l H2 O/kg TCA、 Mai ntain i n d ark bott l e a t 4 oC、Be car e ful, u se glo v es!!!)、 4) S pi n1 5 m in 4o Ci n mic r o f uge a t maximum sp e ed (150 0 0 g)、 Ca refu ll y discha r ge s upern at ant a nd r etain the pellet: d r y t u b e b y i n versi o n on ti s sue paper (pe llet may be diffic u lt to s ee) 、[O PT IO N: W as h pellet tw i ce with one v olume of col d ac e t o ne (a ce to n e ke e p a t –20oC)、 V ortex and r e pellet sa mples 5min a t fu l l s p eed be t ween w a s h e s]、 ﻫ5) D ry s ampl e s u nd er vaccum (speed va c) or d r y a ir、F or PAGE-S DS, re s u s p e n d sa m ple s i n a m i ni m a l volume o fs am ple buffe r、(The presence of some T C A can g iv ea yel l ow col o u ras ac on s equence of the acidi fi ca t i on of th e sa m ple b uffer ; ti t rat e with 1N N a O Hor 1M T r is H Cl pH 8、5 to o btain the no r ma l bl u e sa mp le buff e r co lo u r、) Norma l T C ATo el...