Immunofluorescence in yeast-酵母免疫荧光
Spin 2 ODU of cells 3000rpm, 5' Resuspend in 5ml of 0.1M KPi pH 7.0 Add 0.6ml 37% formaldehyde and rotate (on nutator) at r.t. for 2 hrs. (can store cells fixed at 4'C O/N) Spin down cells (2500 rpm, 2') Wash 2x in 5ml 0.1M KPi pH 7.0 Wash 1x in 5ml 1.2M Sorbitol in 0.1M KPi pH 7.0 Resuspend in 1ml 1.2M Sorbitol/0.1M KPi pH 7 Add 5ul B-mercaptoethanol and 45ul of 10 mg/ml zymolyase Incubate 45' in 30'C incubator (shake tubes once in a while) Spin and wash cells in 5ml 1.2M Sorbitol/0.1M KPi pH 7 Resuspend cells in 1ml 1.2M Sorbitol/0.1M KPi pH 7 (can store cells like this at 4'C O/N ) Staining: Clean slides in ddH2O and acetone. Dilute 1% (w/v) polylysine 10-fold in water Put 15 ul dil. polylysine per well for 5' (Pour MeOH and acetone into Coplin jars at -20'C) Aspirate off liquid w/ drawn out Pasteur Wash 3x in distilled water Add 15 ul of fixed cells to each well for 10' (r.t) Aspir. liq. and plunge immed. into -20 MeOH for 6' then acetone (-20) for 30 seconds. Air dry slides. Put 1 drop BSA/PBS (1x PBS + 10 mg/ml BSA) in ea. well for 5' (r.t) Aspir. liq. Dilute primary Ab in BSA/PBS Add 15 ul of primary Ab to each well Incubate slides in moist chamber for approx. 2 hrs (r.t) Wash wells (by aspiration) 4x with BSA/PBS Dilute secondary Ab in BSA/PBS Add 15 ul of secondary Ab to each well Incubate slides in moist chamber in dark for 2 hrs. (r.t) Wash 4x in BSA/PBS Air dry slides Add mounting medium to slide 1 mg phenylenediamine(-prevents quenching of fluor) first add 100 ul 1M KPi ( monobasic) then after it goes into solution, add 900 ul of glycerol (100%) Coverslip the slide and seal with nail polish. Store at -20 C
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