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<h2 style> <div style="color: black !important; font-family: 'Times New Roman', SimSun, serif !important, line-height:1.5;"> == 阶段一 样品制备 == === BCA定量蛋白 === *'''400000细胞密度接种于6孔细胞培养板,分别于2ml RPMI完全培养基(PBS、LMWH、AST、LANPs(ug/ml))中培育12h''' *'''收集细胞,用细胞核/细胞质蛋白提取试剂盒分别提取各组蛋白质样品(用RIPA裂解缓冲液裂解细胞20 mg--100~200 ul),(4℃10000-14000离心10-15 min),用BCA蛋白浓度测定试剂盒对蛋白质进行浓度定量''' *'''蛋白样品与SDS-PAGE上样缓冲液(5×)按体积比4:1均匀混合,沸水浴10min,冷却后,将各组蛋白用缓冲液(1×)稀释至同一浓度备用(-80℃保存)''' *'''400000细胞密度接种于6孔细胞培养板,分别于2ml RPMI完全培养基(PBS、LMWH、AST、LANPs(ug/ml))中培育12h''' *'''收集细胞,用细胞核/细胞质蛋白提取试剂盒分别提取各组蛋白质样品(用RIPA裂解缓冲液裂解细胞20 mg--100~200 ul),(4℃10000-14000离心10-15 min),用BCA蛋白浓度测定试剂盒对蛋白质进行浓度定量''' *'''蛋白样品与SDS-PAGE上样缓冲液(5×)按体积比4:1均匀混合,沸水浴10min,冷却后,将各组蛋白用缓冲液(1×)稀释至同一浓度备用(-80℃保存)''' <br> <div style="color: red !important> *'''''BCA:A液 B液 蛋白标准样品(蛋白浓度0125-2 mg/ml)''''' *'''''测定:a.每孔加入10 ul样品(96孔板) b.加入200 ul工作液振摇(30 S) c.37℃孵育0.5h(时间越久,温度越高,测量值越高) d.562nm酶标仪测量 e.标准曲线 f.恒温加热器100℃ 5-10 min ,分装保存(-40℃)''''' <div style="color: black !important; font-family: 'Times New Roman', SimSun, serif !important, line-height:1.5;"> === 配置溶液 === *'''1.细胞裂解液=RIPA细胞裂解液:PMSF(100mmol/L异丙醇溶液)=100:1''' *'''2.分离胶、浓缩胶-说明书''' *'''3.电泳缓冲液(1.5 L):4.545 g Tris,21.6 g Glycine,1.5 g SDS,1500 ml UP水;转膜缓冲液(1.5 L):4.545 g Tris,21.6 g Glycine至1200mlUP水,300 ml 甲醇''' *'''4.TBST(1.5 L):3.63 g Tris,12 g NACL至1500 ml UP水,加7.5 ml 吐温-20(0.5/%),5mol/L HCL 调节PH至7.6 ''' *'''蛋白上样缓冲溶液(5×)''' == 阶段二 制胶 == *'''组装制胶装置''' *'''配置分离胶(说明书)''' *'''灌胶:用1 ml移液枪加下层胶,沿一边灌至绿色下缘线,再加左右滑动上层胶至玻璃板边缘,立即慢慢插入梳子,上下层 胶分界线与梳子底部至少大于0.5 cm,放置37 ℃烘箱20 min,等待胶凝固同时配置电泳缓冲溶液''' *'''转移至电泳槽中,短板向内,加入电泳缓冲液至2 gel刻度线,取出玻璃板放入电泳缓冲液中,补满小槽内缓冲液,加大槽缓冲液4 gel处,两槽需有液面高度差,再慢慢拔出梳子''' *'''上样:两边孔弃用或者加Loading buffer,避免边缘效应,上样前可用电泳缓冲液稀释各样品至体积一致,Marker和Loading buffer以1:1混合,Marker 8 ul + 缓冲液 2 ul,不上样的孔加Loading buffer 10 ul''' *'''电泳:点 Manual 点 V,90 V 恒压,小槽内有许多气泡向上跑,RUN,进入分离胶越50 min,进入分离胶后可调至 150 V,等待时配置转膜缓冲液''' == 阶段三 转膜 == *'''剪下合适大小PVDF膜,甲醇浸泡3min,膜的右上角剪一下,用于判断方向,放入缓冲液(凝胶在转膜液中浸泡5min,用于平衡离子)''' *'''''转膜(黑下白上):海绵垫+3层滤纸+PVDF膜+凝胶+3层滤纸+海绵垫+黑色板(放置时黑对黑)''''' *'''4℃,3000 mA转膜60 min(需要大量冰袋,碎冰)等待时配制TBST,5%脱脂奶''' == 阶段四 抗体孵育染色 == *'''转膜后于5%脱脂奶(2 g脱脂奶粉加40 mlTBST)中封闭2 h(37℃,80 rmp),每一格加入5 ml 5%脱脂奶''' *'''TBST洗5 min×5次''' *'''一抗用3%脱脂奶(1.5 g脱脂奶加50 mlTBST)稀释(1格4-5 ml)''' *'''37℃孵育1 h并4℃过夜或37℃ 2 h,回收一抗,保存在-20℃,每次用前加一点(YAP 1 ul)''' *'''TBST洗5 min×5''' *'''二抗用3%脱脂奶(1.5 g脱脂奶加50 mlTBST)''' *'''37℃孵育1 h,TBST洗5 min×5''' *'''显色:葆光Millipore Immobilon western 显色=黑色:白色=1:1,一般各加1 ml,配成2 ml显影液'''
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