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蛋白提取及WB
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==备注== #实验操作: ##制胶前用70%乙醇清洁并擦拭玻璃板,提前洗净烘干。 ##内参一般不和样品同一块膜,单染方便抗体回收,只回收一抗,不回收二抗。一抗多为兔种属,二抗是抗兔的山羊抗,二抗基本只针对一抗的种属。抗体一般-20℃保存。 ##对于悬浮cell或者出现悬浮现象的贴壁细胞,直接移液枪转移12孔板中cell培养液到ep管中,底部留存部分液态培养基用于刮板转移,离心2k rpm 3min,弃去上清,PBS重悬,n合1,再次离心,弃上清,清洗cell,重悬。加入细胞裂解液。 ##制好的胶尽快使用,若需隔夜可将凝胶置于电泳缓冲液中过夜 ##上层溶液左中右位点均匀加入 ##该测定实验本身影响因素较多,所以n个重复合成一个样本进行SDS-PAGE,一组样本尽量一块凝胶进行分析。 ##预实验可省略bca,根据细胞密度简单确定上样体积,使用内参(cell固定表达蛋白,且相对量较为固定)进行相对定量。常用内参: ###GAPDH,参与糖酵解的酶,37 kD ###β-Actin,广泛分布于各种组织中的肌动蛋白,42 kD ###实验室配制loading buffer: ###实验室配制试剂: <table class="wikitable" style="margin: auto; border-collapse: collapse; border: 1px solid #a2a9b1;"> <tr> <th colspan="2">Loading buffer上样缓冲液</th> </tr> <tr> <th>Reagent</th> <th>Quantity </th> </tr> <tr style="border-top: 1px solid #a2a9b1;"> <td>Tris</td> <td>3.8 g</td> </tr> <tr> <td>10%SDS</td> <td>10 mL</td> </tr> <tr> <td>甘油</td> <td>10 mL</td> </tr> <tr> <td>溴酚蓝</td> <td>0.05 g</td> </tr> <tr> <td>UP水</td> <td>100 mL</td> </tr> <tr> <td>巯基乙醇</td> <td>临用前加入,巯基乙醇:与前述溶液按照=1:3混合</td> </tr> </table> <table class="wikitable" style="margin: auto; border-collapse: collapse; border: 1px solid #a2a9b1;"> <tr> <th colspan="2">分离胶</th> </tr> <tr> <th>Reagent</th> <th>Quantity(5mL/板)</th> </tr> <tr> <td>H₂O</td> <td>1 mL</td> </tr> <tr> <td>30%Arc - Bis</td> <td>2 mL</td> </tr> <tr> <td>1 M Tris(pH 8.8)</td> <td>1.9 mL</td> </tr> <tr> <td>10% SDS</td> <td>0.05 mL</td> </tr> <tr> <td>10%过硫酸铵(APS)</td> <td>0.05 mL</td> </tr> <tr> <td>TEMED</td> <td>2 uL</td> </tr> </table> <table class="wikitable" style="margin: auto; border-collapse: collapse; border: 1px solid #a2a9b1;"> <tr> <th colspan="2">浓缩胶</th> </tr> <tr> <th>Reagent</th> <th>Quantity(5mL/板)</th> </tr> <tr> <td>H₂O</td> <td>2.1 mL</td> </tr> <tr> <td>30%Arc - Bis</td> <td>0.5 mL</td> </tr> <tr> <td>1 M Tris(pH 6.8)</td> <td>0.38 mL</td> </tr> <tr> <td>10% SDS</td> <td>0.03 mL</td> </tr> <tr> <td>10%过硫酸铵(APS)</td> <td>0.03 mL</td> </tr> <tr> <td>TEMED</td> <td>3 uL</td> </tr> </table> *实验室制胶方法:先配制并灌注分离胶至绿边下缘1cm,均匀加UP水液封,静置1h直至分界线明显,配制浓缩胶,倒掉液封水,并用滤纸吸干,灌注浓缩胶,插入梳子,静置1h,拔下梳子并加缓冲液排气泡,静置30 min后再上样 #其他: ##该实验用于药效评估,药效前应当先做毒性实验 ##细胞裂解液的成分:pmsf ##封闭液的组成:BSA或5%脱脂奶粉溶液 ##实验室制胶:
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