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# 药学研究
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物质间相互作用
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## API
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## API相关杂质
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稳定性评价变化
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## 工艺相关杂质
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## 外来杂质
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# 杂质研究
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最后是要出一份安全性评估报告
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酶切位点
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强制降解
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高温
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强酸、碱
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酶切
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氧化
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# 稳定性
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分子变化
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分子间的相互作用
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# 工艺过程需要控制的杂质
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原辅料
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工程菌
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TRIS
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消泡剂
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盐酸四环素
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# 外来污染物
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内毒素
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微限
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# 包装材料溶出物
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相容性研究范畴
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# 产品相关杂质
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属主来源
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聚合、断裂
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相关蛋白
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高分子蛋白
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- 名称:人生长激素(rhGH)
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- 分子式:C990H1528N262O300S7
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- 氨基酸组成:
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- 氨基酸数量:191个
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- 二硫键数量:2个
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- ![](media/1b68a6fd3f7581e53e5702809957753f.jpeg)氨基酸序列(来源药典):
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> □
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- 分子量:22 KD
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- 等电点(pH):5.2
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- 宿主菌:大肠杆菌
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- 分泌部位:
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- 膜内分泌、膜外表达
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- 细胞基质,破壁不破膜
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- 紫外最大吸收波长:276nm
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- 杂质成分
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- 细胞来源污染物
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- 相关蛋白质
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- 高分子蛋白质
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- 工艺步骤简述
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- 一级培养
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- 二级培养
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- 种子罐培养
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- 发酵罐培养
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- 冻结
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- 融化
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- 保存
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- 裂解离心
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- 步骤
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- 敲碎
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- 裂解
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> 裂解液缓冲液
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> ◊ 10m mol/L Tris-HCl-1m mol/L EDTA pH7.5±0.5
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- 缓冲液用量
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□ 菌体质量:缓冲液体积=1kg:8L
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□
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- 超滤浓缩
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- 将敲碎后的菌体加入裂解缓冲液
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- 搅拌时长:≥1h
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离心
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- 温度:4℃
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- 离心力:5324g
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- 留存:上清液
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- 盐析
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> 超滤膜包孔径:5KD
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> 一次盐析
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- 目的:使蛋白沉淀出来
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□ 温度:2℃\~8℃
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- 硫酸铵用量:45%,227g硫酸铵/L浓缩液
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- 时长:12h以上(生产排班需求)
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- 一次离心
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- 目的:使蛋白沉淀与杂质溶液分离
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□ 温度:4℃
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□ 离心力:9915g
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- 时长:30min
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- 留存:蛋白沉淀
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- 蛋白溶解
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- 目的:使蛋白沉淀溶解
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- 溶解液:10m mol/L Tris-HCl-1m mol/L EDTA pH 8.0±0.2
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- 二次盐析
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- 目的:使杂蛋白沉淀出来
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□ 温度:2℃\~8℃
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- 硫酸铵用量:20%,114g硫酸铵/L浓缩液
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□ 时长:0.5h\~1h
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- 二次离心
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- G25
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- 目的:使目的蛋白溶液与杂质蛋白沉淀分离
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□ 温度:4℃
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□ 离心力:9915g
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- 时长:30min
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- 留存:上清液
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目的
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- 将样品中的盐脱去
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- 层析原理
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- 分子筛
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- 填料性质
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- 名称:Sephadex G 25
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- 缓冲液
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- 平衡缓冲液、洗脱缓冲液
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- 10m mol/L Tris-HCl-1m mol/L EDTA pH 8.0±0.2
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- 最终蛋白质缓冲体系
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□ 1
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- DEAE1
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- 层析原理
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□
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- 目的
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□
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> 离子交换(弱阴离子交换)
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> 捕获目的蛋白
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- 填料性质
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- 名称:DEAE Sephrose F.F
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- 缓冲液
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- 平衡缓冲液
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- 0.3mol/L Tris-HCl-30m mol/L EDTA
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- 0.04mol/L NaCl-10m mol/L Tris-HCl-1m mol/L EDTA
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- 样品调节缓冲液
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- 0.04mol/L NaCl -10m mol/L Tris-HCl-1m mol/L EDTA
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- 冲洗缓冲液
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- 0.04mol/L NaCl-10m mol/L Tris-HCl-1m mol/L EDTA
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- 洗脱缓冲液
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- Phenyl
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- 0.1mol/L NaCl-10m mol/L Tris-HCl-1m mol/L EDTA
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- 层析原理
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- 疏水
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- 填料性质
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- 名称:Phenyl Sepharose F.F
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- 缓冲液
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- 平衡缓冲液
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- 0.7mol/L (NH4)2SO4-10m mol/L Tris-HCl-1m mol/L EDTA
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- 样品调节缓冲液???
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- 3.5mol/L (NH4)2SO4溶液、1mol/L Tris-HCl-100mmol/L EDTA
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- 冲洗缓冲液
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- 0.7mol/L (NH4)2SO4-10m mol/L Tris-HCl-1m mol/L EDTA
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- 洗脱液
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- 0.5mol/L (NH4)2SO4-10m mol/L Tris-HCl-1m mol/L EDTA
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- 0.35mol/L (NH4)2SO4-10m mol/L Tris-HCl-1m mol/L EDTA
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- 0.05mol/L (NH4)2SO4-10m mol/L Tris-HCl-1m mol/L EDTA
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- 盐析(去除硫酸铵、Tris,缩小体积)
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- 盐析
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□
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□
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□
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□
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> 目的:使蛋白沉淀出来温度:?
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> 硫酸铵用量:3.5mol/L硫酸铵溶液→硫酸铵终浓度:1.35mol/L~1.83mol/L
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> 时长:10min
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- 一次离心
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- 目的:使蛋白沉淀与杂质溶液分离
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□ 温度:4℃
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□ 离心力:9910g
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- 时长:30min
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- 留存:蛋白沉淀
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- 蛋白溶解
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- 目的:使蛋白沉淀溶解
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- 溶解液:5m mol/L PB pH 7.2±0.1
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- 蛋白浓度:35mg/ml\~50mg/ml
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- 二次离心
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- 目的:使目的蛋白溶液与杂质蛋白沉淀分离
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□ 温度:4℃
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□ 离心力:9910g
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- S-100
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- 时长:15min
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- 留存:上清液
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- 层析原理
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- 分子筛
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- 填料性质
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- 名称:Sephacryl S100 H.R
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- 排阻范围:1\~100KD
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- 缓冲液
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- 平衡缓冲液、洗脱缓冲液
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- 步骤
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- 平衡
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- 上样
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- 洗脱
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- 收集
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1. mol/L NaCl-5m mol/L PB
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- DEAE2
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- 目的
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□
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> 捕获目的蛋白
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- 层析原理
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- 离子交换(弱阴离子交换)
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- 填料性质
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- 名称:DEAE Sephrose F.F
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- 缓冲液
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- 平衡缓冲液
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- 200m mol/L PB
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- 5m mol/L PB
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- 样品调节缓冲液
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- 5m mol/L PB
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- 冲洗缓冲液
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- 5m mol/L PB
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- 洗脱缓冲液
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- 0.02mol/L NaCl-5m mol/L PB
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- 0.05mol/L NaCl-5m mol/L PB
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- 0.08mol/L NaCl-5m mol/L PB
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- 超滤浓缩
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- 目的
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□
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- 原理
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□
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> 洗滤除去小分子的盐离子,浓度目的蛋白目的蛋白不能通过超滤膜
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- 超滤膜包
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- 材质
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- 孔径
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> 聚醚砜
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> 5KD
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- 单块膜包有效面积
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- 0.5m2
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- 最终蛋白缓冲体系
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- G25脱盐(水剂)
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- 层析原理
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- 层析柱的装填
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- 好的层析柱装填→好的层析柱→好的结果
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- Q&A
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○
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○
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○
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> 有的核酸蛋白检测仪不稳定,示数经常漂移,不同的核酸蛋白检测仪测出来的柱效不一样,应该以更稳定的蛋白仪测出的柱效为准?或设备条件?
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> TE溶液的配制为什么需要通过浓硫酸调节pH,是否有其他方式,减少用危险化学用品的使用为什么粗纯缓冲液用TE,精纯缓冲液用PB
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白性质
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