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蛋白提取及WB
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==SDS-PAGE== ===制胶=== <ol type="1"> <li>支架下方垫橡胶垫实现密封,薄板朝外装载玻璃板,对准刻度(吸头辅助夹紧)[[File:SDS-PAGE制胶装置.jpg|center|thumb|300px|SDS-PAGE制胶装置]] <li>配制电泳液:每次用量约1.5 L <table class="wikitable" style="margin: auto; border-collapse: collapse; border: 1px solid #a2a9b1;"> <tr> <th colspan="2">1.5L SDS-PAGE电泳液组成</td> </tr> <tr> <th>Reagent</td> <th>Quantity (for 1.5 L)</td> <tr> <td> Tris</td> <td>4.545 g</td> <tr> <td> 甘氨酸</td> <td>21.6 g</td> <tr> <td>SDS</td> <td>1.5 g</td> <tr> <td> UP水</td> <td>1.5 L </tr> </table> <li>根据目标蛋白的分子量,按照商品化制胶试剂说明书调配试剂,制作分离胶和浓缩胶,倒入玻璃板,分离胶灌至距绿边1cm,浓缩胶灌满,插入梳子(刻度向外),注意观察梳齿气泡。[[File:SDS-PAGE凝胶比例.jpg|center|thumb|300px|SDS-PAGE凝胶比例]] <li>凝固后,将玻璃板转移至电泳槽中,薄板向里,薄板上沿对齐标线,下沿不用触底,向夹层中倒入电泳液,验漏(是否夹紧,否则电泳时功率不稳) <li>拔出梳子,用加样吸头吸取电泳液清洗样品孔,排气泡以及排除残余胶液 <li>上样及marker,一般1孔20ug,最多30ul,10孔梳10-15 ul/孔,15孔梳7-10 ul/孔;最侧边的孔及空余孔上样 1xloading buffer(电泳液稀释) <li>电泳电压:浓缩胶约90V(W约为4W),分离胶约150V(W约为8W),室温 <li>溴酚蓝迁移至凝胶2/3处即可停止电泳[[File:SDS-PAGE电泳例图.jpg|center|thumb|300px|SDS-PAGE电泳例图]] </ol> ===转膜=== <ol type="1"> <li>转膜缓冲液的配制: <table class="wikitable" style="margin: auto; border-collapse: collapse; border: 1px solid #a2a9b1;"> <tr> <th colspan="2">1.5L 转膜缓冲液组成</th> </tr> <tr> <th>Reagent</th> <th>Quantity (for 1.5 L)</th> </tr> <tr style="border-top: 1px solid #a2a9b1;"> <td>Tris</td> <td>4.545 g</td> </tr> <tr> <td>甘氨酸</td> <td>21.6 g</td> </tr> <tr> <td>UP水</td> <td>1.2 L</td> </tr> <tr> <td>乙醇</td> <td>300 mL*</td> </tr> <tr style="border-top: 1px solid #a2a9b1;"> <td colspan="2"><i>*:乙醇待水溶液体系完全溶解后再加入</i></td> </tr> </table> <li>PVDF膜及其支撑膜浸入乙醇中活化5 min;转入转膜缓冲液浸泡;可在膜右上角剪口分辨方向 <li>转膜缓冲液倒入盘中,各层预先在盘中浸透 <li>黑色在下,按照海绵(层数可增加,能夹紧即可)-1层滤纸-gel(切割周围)-膜-1层滤纸-海绵,进行叠加,注意覆盖转膜液排出气泡,夹紧,按照标识放入电泳槽 <li>4 ℃冰水浴,300 mAh,电泳约50 min </ol> ===WB=== [[File:WB实验.jpg|center|thumb|300px|WB实验]] <ol> <li>剪裁目标蛋白和参比蛋白的膜,浸入封闭液中,摇床15min(按封闭剂的种类) <li>TBST配制: <table class="wikitable" style="margin: auto; border-collapse: collapse; border: 1px solid #a2a9b1;"> <tr> <th colspan="2">0.5L TBST缓冲液组成</th> </tr> <tr> <th>Reagent</th> <th>Quantity (for 0.5 L)</th> </tr> <tr style="border-top: 1px solid #a2a9b1;"> <td>Tris</td> <td>1.21 g</td> </tr> <tr> <td>NaCl</td> <td>4 g</td> </tr> <tr> <td>UP水*</td> <td>0.5 L</td> </tr> <tr> <td>吐温20**</td> <td>2.5 mL(0.5%)</td> </tr> <tr style="border-top: 1px solid #a2a9b1;"> <td colspan="2"><i>*:Tris和NaCl溶解后HCl调整pH至7.6(pH计)</i></td></tr> <tr style="border-top: 1px solid #a2a9b1;"> <td colspan="2"><i>**:调完pH再加吐温,使用用特殊的枪和吸头</i></td></tr> </tr> </table> <li>回收封闭液,TBST清洗5次(摇床5 min) <li>加一抗5ml(用3%脱脂奶粉in TBST按照说明书稀释),膜浸透,避免漂浮或粘壁,37度摇床1h,4℃过夜 <li>回收一抗,膜用TBST清洗5次,每次摇床5min后弃去,去除残余一抗 <li>加入二抗(用3%脱脂奶粉稀释),37度摇床1h,TBST清洗5次,最后将膜保存在TBST中 <li>使用314的BioRad凝胶成像系统,image lab软件,将缓冲液中保存的膜浸泡至显影液(按说明书配制)中2min,转移至培养皿,放入样品盘,成像 <li>仪器: <ol> <li>开机:插排-稳压电源-仪器-电脑(关机反方向) <li>image lab软件:运行软件-确定-select scanner-chom...-select-chem Hi sentilye(取消VVA勾选) [[File:WB结果例图.png|center|thumb|300px|WB结果例图]]
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