其它重组蛋白

Cyanogen Bromide digestion of protein

1.ProteinsareTCAprecipitatedandwashedwithacetone,thendried.2.TheCNBrshouldbebroughttoroomtemperatureinthehoodandusedONLYinthehood.Extremelytoxic!3.DissolveasmallamountofCNBrin70%TFA,theexactamountisnotcritical.Oneortwocrystalsshouldbefine,althoughweighingthisreagentisNOTrecommended.PlacetheutensilusedindilutebleachtoneutralizetheresidualCNBr.4.Redissolvetheprecipitatedproteinin100microlitersofCNBr/TFAsolution,closetube.5.Digestionoftheproteinwilltakeabout36to72hoursatroomtemperature.6.DrythesamplesbySpeedvacwithheatforanhour.BeverycarefuloflingeringfumeswhenremovingsamplesfromtheSpeedvac.7.Redissolvethedigestedproteininwaterorotherbuffer.Thesesamplesaresomewhatacidicandshouldbeneutralizedwith1MTris8.0beforeloADIngtoSDSPAGE.

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