Harnessthepowerofintracellularcompoundstoimproveyourcrystallisations.
ThenewDurhamOsmolytescreenallowsyoutotestwhichofabroadrangeofcellcomponentshelpstABIliseyourprotein,improvingtheresultsofstructuralandfunctionalstudies.ThedevelopersofthescreendescribetheimportanceofstabilityscreeningforproteinstructuralandfunctionalstudiesinthisJoVEarticle:
Osmolytesareuncharged,highlysolubleorganicmoleculesthatactincellstobalancehighexternalsaltconcentrationswithoutdisturbingintracellularionicstrength.Thismakesosmolytestheidealadditivesforstabilisingyourproteinduringstructuralandfunctionalstudiesastheyareusuallypresentinhighconcentrationsinnativecellenvironmentswithoutaffectingproteinbehaviour.
EasilyidentifywhichosmolytesaremostbeneficialtoyourresearchwithTheDurhamOsmolytescreen,a96-wellscreenthatscansmorethan50differentosmolytes,availableexclusivelyfromMolecularDimensions.
Osmolytessuchassugars,polyols,amino-acids,NDSBsandmanyotherchemicalclassesareincludedinthescreen,forexample:

Tooptimiseyourprotein’scompleteenvironment,werecommendusingtheOsmolytescreentogetherwiththeDurhampHandSaltscreens.AllthreescreensweredevelopedatDurhamUniversitybyEhmkePohl,DanielBruce,MortenGrøftehaugeandEmilyCardew.
TheDurhamScreensaredesignedtoworkwithNAMI*thefreetodownloadsoftwareforeasyinterpretationofthermalshiftassayresults.Reference:Bruce,D.etal.J.Vis.Exp.144:e58666(2019).TheDurhamOsmolyteScreenispresentedas96x0.5mLconditionsinadeep-wellblock.Theyarepreservativefreeanditisrecommendedthattheyarestoredat4°C,howevertheycanbeusedatroomtemperatureforscreenset-up.*NAMIcangeneratewaterfallplotsofthermalshiftdataatmultipleconcentrationsorplotsofmeltingtemperatureagainstconcentration.Thesedifferentiateasuddenincreaseinproteinstabilityindicatingaspecificinteractionandsteadyincreasesinstabilityduetothechangingproteinenvironment.Inaddition,itproducesausefulcolourgrADIentplatediagramtomakeidentifyingparticularlystabilisingordestabilisingconditionssimple.ThermoFluorisaregisteredtrademarkofJohnsonandJohnson.ebiomall.com
>
>
>
>
>
>
>
>
>
>
>
>
2.NaNO3FeCl3AgNO3
分别有什么现象?谢谢回答!
通过解答,教会我,谢谢
A.H2SO4Na2SO4AgNO3BaCl2.
B.NaOHNa2CO3NaHSO4MgCl2
C.CaCl2NaNO3MgSO4BaCl2
D.HNO3KOHKClK2CO3

