伯乐CHEF Mapper XA脉冲场电泳仪
伯乐CHEFMapperXA脉冲场电泳仪CHEFMAPPERXA是目前******的脉冲场电泳系统,拥有专利设计的六角形电极的电泳槽,保证矢量电场的自由旋转,比常规的脉冲场电泳提供更高的分辨率,电泳速度和更***的分离,对100bp-10Mb的DNA片段都能提供有效的分离。主要用于***组DNA的分离分析,大分子DNA的***图谱分析及多态性分析等。1.自动演算:Bio-Rad积多年在脉冲场电泳方面的经验,提供给用户一套程序用于优化实验参数。只要输入待分离DNA片段的***小、***大长度,结合10个主要变量的确定,帮助使用者获得***理想的实验条件。2.脉冲角度:可以在0-360°间自由选择脉冲角度,使用户可以在同一系统上实现大至染色体级、小至质粒DNA的有效分离。3.时间转换梯度:有线性、非线性(凸形和凹形)两种脉冲时间梯度,非线性梯度可以提供更广泛的分离动态范围,使用户可以***的确定分离片段的大小。4.多状态功能:CHEFMapperXA在一个Block中可以有15个电场矢量,每个电场矢量可以有自己的电压和转换时间,可有选择地对一定大小范围的片段进行更精细的分离,并且可以在同一次电泳中实现FIGE和CHEF两种技术。5.二次脉冲功能:二次脉冲可加速DNA从琼脂糖凝胶中释放,从而有利于非常大的DNA片段的分离,并可提高分辨率。6.技术应用:CHEF(钳式均衡电场)技术,产生均衡电场;PACE(程序自主控制电极)技术,根据片断大小的需要优化设定脉冲角度;FIGE(电场倒置)技术,为250KB以下小片断DNA提供快速分离;AFIGE(非对称场倒置)技术,精细分离小片断DNA,提高分辨率;以上技术的应用保证了科研人员在所有分子量范围内均能得到所***佳的线性分离。性能指标:a.电源输出:***高电压350V,0和0.6-9V/cm,0.1V/cm增量,连续可调b.***大电流:0.5Ac.延迟启动:***高72小时d.电极调节能力:动态调节(反馈调整)&plu***n;0.5%e.程序储存:存储20个复杂实验程序,每个程序包含8个程序模块或99个简单程序f.数据记录:键盘,条形码读取或RS-232接口g.显示屏:2行×40字符/行,荧光显示h.转换范围:50毫秒到18小时i.转换角度:0-360°,0.5°增量j.电泳时间:***高999小时/模块脉冲中断设置:可以通过电压,频率,角度和持续时间设定TheCHEFMappersystemletsyouchooseanypulseanglefrom0–3,600.ThisallowsyoutoachieveoptimalseparationofbothchromosomalDNA(Figure1)andpla***idDNA(Figure2),withoneflexiblesystem.A,106°angle;B,120°angle.Two-statemode48hrrun2V/cm(67V),14°C,1xTAE30minswitchtime0.8%chromosomal-gradeagaroseFig.1,IncreasedmobilityofS.pombechromosomesusingtheCHEFMapperXAsystemFIGEmode180°angle1xTAE,14°C9V/cmforward6V/cmreverse18hrrunSwitchtime200–800msrampForwardswitchtime=reversetimeLane1:Bio-RadlambdaHindIIIstandard(6.6,9.4,23.1kb)Lane2:Bio-Rad8–48kbsizestandard(8.3,8.6,10.0,12.2,15.0,17.1,19.4,22.6,24.8,29.9,33.5,38.4,48.5kb)Fig.2,Highresolutionof8–48kbsizestandardontheCHEFMapperXAsystemwithasymmetricvoltageFIGE.Accuratesizingoffragmentsrequiresanexpandedlinearrangeofseparation.Switch-timerampsincreasethemobilityoffragmentsasafunctionofmolecularweightbygraduallychangingtheswitchtimesduringthecourseofarun.Nonlinearrampschangetherateatwhichtheswitchtimemovesfromthespecifiedinitialswitchtimetothespecifiedfinalswitchtime.Thesenonlinearramps(e.g.,conc***eorconvex)h***ebeenshowntoprovideverylinearseparati***from50–700kb(Figure3).Therefore,fragmentsizeswillbemeasuredmoreprecisely.Fig.3.MobilityeffectsofnonlinearswitchtimerampsontheCHEFMappersystem.Molecularsizevs.migrationforlinear,conc***e,andconvexramps.Theconvexrampresultsinthewidestlinearrange.Themulti-statemodeoftheCHEFMappersystemenhancesresolutioninselectedfragmentsizeranges.Eachvector(angleofpulse)canbeassigneditsownvoltage(fieldintensity)anditsownswitchtime(durationofpulse).Uptoeightdifferentstatesmaybecombinedintooneruntooptimizetheseparationofsubsetsoffragmentsinthesample(Figure4).Theapplicationofsecondarypulsesofdefinedvoltage,duration,angle,andfrequencycanenhancetheseparationandresolutionofverylargeDNAmolecules(Figure5).ThesesecondarypulsesmayreleaseDNAcaughtinthegelmatrix.A.Two-statemode24hrruntime,120°includedangle60to120secswitch-timeramp6V/cm,0.5xTBEat14°C1.0%pulsedfieldCertifiedagaroseB.Multi-statemode60hrruntimeState(vector)1.90secswitchtime,-60°angle2.45secswitchtime,180°angle3.90secswitchtime,60°angle4.90secswitchtime,-60°angle5.90secswitchtime,60°angle6.45secswitchtime,180°angle7.90secswitchtime,-60°angle8.90secswitchtime,60°angleFig.4High-resolutionseparationwithmultiplestates(vectors).S.cerevisiaechromosomesseparatedunderA,two-stateconditi***;B,multi-stateconditi***.Noticeseparationoftheco-migratingchromosomeswithmulti-stateconditi***.Multi-statemode20hrruntime,120°includedangle60to120secswitch-timeramp6V/cm(200V),0.5xTBEat14°C1.0%molecularbiologyCertifiedagaroseSecondarypulses6V/cm(200V),0°angle3secswitchtime4pulses/minuteFig.5.Increasedseparationwithsecondarypulsed-fieldelectrophoresis(SPFE).S.cerevisiaechromosomesseparatedunderA,twostateconditi***;B,two-stateconditi***withsecondarypulses.更多资料欢迎来电来信免费索取:http://010-5848166958481677)
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