当前位置:文档之家› 酶标仪常见技术和应用

酶标仪常见技术和应用


细胞活力检测
细胞活性检测 – MTT、XTT法
• MTT-黄色染料 ↓被活体细胞线粒体中的琥珀酸脱氢酶还原 • 形成蓝紫色结晶-甲瓒 ↓DMSO溶解 检测OD570(OD630作为背景参照) 细胞质 线粒体 细胞核 cell
©2012 For research use only. Not for use in diagnostic procedures. Trademarks mentioned herein are property of Molecular Devices, LLC or their respective owners.
最常见应用类型ELISA(酶联免疫吸附试验)实验
反应原理 阳性样品
阴性样品
加入底物
显色反应
©2012 For research use only. Not for use in diagnostic procedures. Trademarks mentioned herein are property of Molecular Devices, LLC or their respective owners.
DNA、RNA或蛋白浓度检测
DNA双螺旋中碱基 蛋白质酪氨酸、色氨酸、苯丙氨酸成分含量
A = a*c*l a = 物质消光系数 c = 浓度 l= 光径(0.5mm或者1mm)
决定上 样体积
SMP软件自动给出 DNA浓度:OD260=1表示
50 µg/ml双链DNA(dsDNA)
DNA纯度:纯度计算(OD260/OD280)
21/02/2014
目前中国市场主要几个酶标仪厂家
产品线丰富(高中低,Multi-mode 11、Single-mode 9) 新产品推出速度快(Paradigm、I3+ MinMax 、I3+ Scanlater) 品牌知名度高、市场占有率大 MD主要竞争对手(Multi-mode 8、Single-mode 10) 新产品推出紧随MD(如Cytation3对应I3、Neo对应 Paradigm ) 产地瑞士、在欧洲及北美有较高知名度 (Multi-mode 3、Single-mode 3) 最近无新产品推出,进入中国较早,在东北地区用户较多 主要产品非酶标仪(Multi-mode 3、Single-mode 10) 最近无心产品推出 具有专利Alpha技术,但没有型号支持HTRF技术(认证) 主要产品非酶标仪(Multi-mode 4、Single-mode 2) 多功能酶标仪(覆盖全波长)仅一款VF,只有四功能 无最新产品问世
物质最佳吸收波长
不同物质有不同吸收峰,有些实验检测物质需要更宽的波长 范围
©2012 For research use only. Not for use in diagnostic procedures. Trademarks mentioned herein are property of Molecular Devices, LLC or their respective owners.
全波长带来优势——ELISA不同颜色需不同波长 酶决定底物类型
碱性磷酸酶(AP) 常用底物:PNPP 405nm 特点:本底低,灵敏度高,较昂贵 辣根过氧化物酶(HRP) 底物:ABTS 410/650nm OPD 492nm TMB 450nm 特点:常用,灵敏度不如AP系统
©2012 For research use only. Not for use in diagnostic procedures. Trademarks mentioned herein are property of Molecular Devices, LLC or their respective owners.
酶标仪能做什么?
凡是与光信号相关的实验、需要高通量、需要节省试 剂的实验 且可以转移到微孔板中液体物质 都可以考虑使用微孔板检测仪(酶标仪)进行信号检 测!
©2012 For research use only. Not for use in diagnostic procedures. Trademarks mentioned herein are property of Molecular Devices, LLC or their respective owners.
Agenda
• 酶标仪工作原理及应用范围 • 光吸收检测技术原理及常见应用 • 荧光检测技术原理、分类及常见应用 • 化学分光技术检测原理及常见应用 • Alpha技术特点
©2012 For research use only. Not for use in diagnostic procedures. Trademarks mentioned herein are property of Molecular Devices, LLC or their respective owners.
DNA纯品: OD260/OD280 = 1.8
©2012 For research use only. Not for use in diagnostic procedures. Trademarks mentioned herein are property of Molecular Devices, LLC or their respective owners.
酶活力分析
酶活性分析:就是指在一定条件下,通过连续 测定酶的吸光值,从而达到动态监测酶活性的 一个过程。
• 乳酸脱氢酶( LDH )活 性检测 • β-半乳糖苷酶检测 • 血清心肌酶活性检测 • 脱氢酶活性检测
©2012 For research use only. Not for use in diagnostic procedures. Trademarks mentioned herein are property of Molecular Devices, LLC or their respective owners.
酶标仪常见技术和应用
尹迪
©2012 For research use only. Not for use in diagnostic procedures. Trademarks mentioned herein are property of Molecular Devices, LLC or their respective owners.
酶标仪与分光光度计的不同?
1:通量上 支持6、12、24、48、96、384孔板,高端酶标仪 可达到3456孔板
2:功能上 单功能酶标仪(吸收光、荧光、化学发光) 多功能酶标仪
©2012 For research use only. Not for use in diagnostic procedures. Trademarks mentioned herein are property of Molecular Devices, LLC or their respective owners.
酶标仪工作原理
• 工作原理为一台升级版的分光光度计
1.紫外可见分光光度计 2.可见分光光度计 3.紫外分光光度计 4.荧光分光光度计 5.近红外分光光度计 6.红外分光光度计 7.双光束紫外可见分光光度计 不同物质对 特点波长光 吸收值
©2012 For research use only. Not for use in diagnostic procedures. Trademarks mentioned herein are property of Molecular Devices, LLC or their respective owners.
光吸收的基本检测类型
•应的产物产生的颜色变化(450nm) 酶联免疫吸附试验(ELISA)
• 浊度检测: 检测样品中微颗粒产生的光的散射 细菌的生长(600nm)
©2012 For research use only. Not for use in diagnostic procedures. Trademarks mentioned herein are property of Molecular Devices, LLC or their respective owners.
©2012 For research use only. Not for use in diagnostic procedures. Trademarks mentioned herein are property of Molecular Devices, LLC or their respective owners.
光波长范围
多数低端单功能酶标仪光谱范围(400-750nm) 中、高端单功能或多功能光谱范围(200-1000nm)
©2012 For research use only. Not for use in diagnostic procedures. Trademarks mentioned herein are property of Molecular Devices, LLC or their respective owners.
酶标仪——多功能微孔板读板机(仪)
学名:微孔读板机(仪) Microplate Reader 俗称:国内俗称酶标仪,因早期主要用于酶联免疫检 测(ELISA),故久之习称为酶标仪
©2012 For research use only. Not for use in diagnostic procedures. Trademarks mentioned herein are property of Molecular Devices, LLC or their respective owners.
光吸收检测常见应用
利用光吸收原理最常见的几种生物学实验 DNA/RNA含量检测 常用于快速检测质粒DNA浓度 ELISA(酶联免疫吸附试验)检测 方法多(间接法、竞争法、双抗夹心法等)、应用广 细胞活力检测 MTT、XTT等 酶活动力学检测
相关主题