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1、產(chǎn)品信息產(chǎn)品名稱產(chǎn)品編號(hào)規(guī)格價(jià)格(元)40%Acr-Bis(19:1)20303ES76500ml220.0040%Acr-Bis(29:1)20304ES76500ml220.0040%Acr-Bis(37.5:1)20305ES76500ml220.00產(chǎn)品描述Acr-Bis常用于配制丙烯酰胺凝膠(PAGE膠),包括SDS-PAGE膠等,可以用于蛋白或核酸的分離。聚丙烯酰胺凝膠是由丙烯酰胺(acrylamide,簡(jiǎn)稱Acr)和交聯(lián)劑甲叉雙丙烯酰胺(N,N’-methylenebisacrylamide,簡(jiǎn)稱Bis)在催
2、化劑的作用下,通過自由基引發(fā)聚合反應(yīng),形成不帶電荷、且具有分子篩性質(zhì)的網(wǎng)狀結(jié)構(gòu)。其孔徑大小由聚合鏈的長(zhǎng)度和交聯(lián)度(交叉連接的程度)所決定。聚合鏈的長(zhǎng)度與丙烯酰胺的濃度有關(guān),交聯(lián)度由Acr與Bis的相對(duì)比例決定,調(diào)節(jié)單體丙烯酰胺與交聯(lián)劑(Bis)的濃度比例,可形成具有不同交聯(lián)度的網(wǎng)狀聚合物。其中Bis的濃度愈低,凝膠的孔徑愈大,適用于分離較大的分子;Bis的濃度愈高,網(wǎng)孔越小,分辨率越高,越有利于分離較小的分子。40%Acr-Bis(19:1)即為含40%acrylamide-bisacrylamide的水溶液,其中acry
3、lamide和bisacrylamide的比例為19:1。40%Acr-Bis(29:1)即為含40%acrylamide-bisacrylamide的水溶液,其中acrylamide和bisacrylamide的比例為29:1。40%Acr-Bis(37.5:1)即為含40%acrylamide-bisacrylamide的水溶液,其中acrylamide和bisacrylamide的比例為37.5:1。運(yùn)輸與保存方法冰袋(wetice)運(yùn)輸。4℃避光保存。注意事項(xiàng)1)????????Acr-Bis具有一定神經(jīng)毒性,使用
4、時(shí)請(qǐng)注意適當(dāng)防護(hù)。2)????????為了您的安全和健康,請(qǐng)穿實(shí)驗(yàn)服并戴一次性手套操作。ThePolyacrylamideMatrixThepolymerizationofapolyacrylamidematrixwithmethylenebisacrylamidecross-linking.?Polyacrylamidegelsareformedbythepolymerizationofacrylamideinaqueoussolutioninthepresenceofsmallamountsofabifunctiona
5、lcrosslinker.Thecrosslinkerisusuallymethylene:bisacrylamide(bis,orMBA).Thecopolymerizationofacrylamidewithmethylenebisacrylamideproducesamesh-likenetworkinthreedimensions,consistingofacrylamidechainswithinterconnectionsformedfromthemethylenebisacrylamide.Avarietyo
6、fcrosslinkersareavailableinadditiontobis.Theseincludepiperazinediacrylate(PDA),N,N'-bisacrylylcystamine(BAC),andN,N'-diallyltartardiamide(DATD).PDAisusedtoreducesilverstainbackgroundsinSDS-PAGEgels.BACandDATDarebothdisruptablecross-linkerswhichenablegelstobesolubi
7、lized.BAC,?DATD,andPiperazinediacrylatearesometimesusedasthecross-linkersinpolyacrylamidegelstovarythephysicalorchemicalpropertiesofthegel.Fordiscussionsofthecompositionofpolyacrylamidegels,astandardnomenclaturehasbeenwidelyadopted.Inthisnomenclature,Trepresentsth
8、etotalpercentageconcentration(w/v)ofmonomer(acrylamidepluscrosslinker)inthegel.ThetermCreferstothepercentageofthetotalmonomerrepresentedbythecrosslinker