Applicationexample: TotalproteinfromOryzasativarice(CV.9311)flagleafatthe tilleringstagewasgroundintoafinepowderinliquidnitrogen.An800ulaliquotofextractionbuffer[62.5mMTRIS-HCl(pH7.4),10%glycerol,0.1%SDS,2mMEDTA,1mMphenylmethylsulphonylfluoride(PMSF),5%(v/v)b-mercaptoethanol]wasaddedtoeach300mgpowdersample.Themixturewasvortexedandthenchilledonicefor10min.Sampleswerecentrifugedat12,000rpmfor10min.at4℃,andthesupernatantwascollectedandstoredat–70℃.TheproteinconcentrationsofthericesamplesweredeterminedusingtheBradfordmethod(Bradford,1976).20µgofproteinwasseparatedon12%SDS-PAGEandblotted1htoPVDF. Blotswereblockedwithfor1hatroomtemperature(RT)withagitation.Blotwasincubatedintheprimaryantibodyatadilutionof1:1000for1hatRTwithagitation.Theantibodysolutionwasdecantedandtheblotwasrinsedbrieflytwice,thenwashedoncefor15minand3timesfor5mininTBS-TatRTwithagitation.Blotwasincubatedinsecondaryantibody(anti-rabbitIgGhorserADIshperoxidaseconjugated)dilutedto1:10000infor1hatRTwithagitation.Theblotwaswashedasaboveanddevelopedfor5minwithECLaccordingtothemanufacturer’sinstructions.Exposuretimewas 2min.
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