Team:HKUST/Protocols/Western blotting

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===Western Blotting===
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*1. Yeast transformed cells containing appropriate plasmids were grown in SCM with appropriate amino acids deleted and harvested at a cell density corresponding to an OD600 of a 10-fold dilution reaching 0.2.  
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*2. 2× Laemmli’s buffer (20% v/v glycerol, 0.1M Tris-HCl pH 6.9, 4% SDS, 0.2% bromophenol blue, 10% mercaptoethanol) was added and yeast crude extracts were prepared by glass bead lysis and separated on 10% SDS-PAGE.
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*3. The 10% resolving gel and the 5% stacking gel were cast according to the method described in Molecular Cloning (Sambrook et al., 1989).Separation was performed on a Mini Protean 3 gel and transblot system (Biorad). Proteins were stacked at 60-80 volts in the stacking gel and resolved at 120-150 volts in the resolving gel.  
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*4. The proteins were then transferred onto a nitrocellulose membrane (pore size 0.45 μm, Schleicher &Schuell) in electrophoretic blotting system (C.B.S. Scientific) by applying a constant current of 0.5 mA for 1.5 hours.
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<title>Salt and Soap template</title>
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*5. After transferring, the membrane was taken out and socked in Ponceau S solution (0.5% Ponceau S in 1% HAc) for 1 min. After rinsed with ddH2O and labeled with protein marker bands.
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*6. The membrane was destained with TBST buffer (10 mM Tris-HCl pH8.0, 150 mM NaCl, 0.05% v/v Tween-20) and blocked with 5% milk in TBST for 30 min.  
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*7. Then the membrane was incubated with the primary antibody (mouse monoclonal antibody against Flag) for 1 hour at room temperature followed by 3 × 15 min washing with TBST.  
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*8. The membrane was then incubated with secondary antibody (goat anti-mouse antibody conjugated with horseradish peroxidase) for 1 hour at room temperature followed by 3 × 15 min washing with TBST.  
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*9. After that, the membrane was incubated in SuperSignal chemiluminescence substrate (Pierce) for 5 min and exposed to light-sensitive films (Fuji).  In the end, the film was developed in a film-processing machine (Eastman Kodak).
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<div class="contentlist"> <h3>a</h3>
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<p>Western Blotting</p>
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<p>Procedure: </p>
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1. Yeast transformed cells containing appropriate plasmids were grown in SCM with appropriate amino acids deleted and harvested at a cell density corresponding to an OD600 of a 10-fold dilution reaching 0.2.  
 +
2. 2× Laemmli’s buffer (20% v/v glycerol, 0.1M Tris-HCl pH 6.9, 4% SDS, 0.2% bromophenol blue, 10% mercaptoethanol) was added and yeast crude extracts were prepared by glass bead lysis and separated on 10% SDS-PAGE.
 +
3. The 10% resolving gel and the 5% stacking gel were cast according to the method described in Molecular Cloning (Sambrook et al., 1989).Separation was performed on a Mini Protean 3 gel and transblot system (Biorad). Proteins were stacked at 60-80 volts in the stacking gel and resolved at 120-150 volts in the resolving gel.  
 +
4. The proteins were then transferred onto a nitrocellulose membrane (pore size 0.45 μm, Schleicher &Schuell) in electrophoretic blotting system (C.B.S. Scientific) by applying a constant current of 0.5 mA for 1.5 hours.
 +
5. After transferring, the membrane was taken out and socked in Ponceau S solution (0.5% Ponceau S in 1% HAc) for 1 min. After rinsed with ddH2O and labeled with protein marker bands.
 +
6. The membrane was destained with TBST buffer (10 mM Tris-HCl pH8.0, 150 mM NaCl, 0.05% v/v Tween-20) and blocked with 5% milk in TBST for 30 min.  
 +
7. Then the membrane was incubated with the primary antibody (mouse monoclonal antibody against Flag) for 1 hour at room temperature followed by 3 × 15 min washing with TBST.  
 +
8. The membrane was then incubated with secondary antibody (goat anti-mouse antibody conjugated with horseradish peroxidase) for 1 hour at room temperature followed by 3 × 15 min washing with TBST.  
 +
9. After that, the membrane was incubated in SuperSignal chemiluminescence substrate (Pierce) for 5 min and exposed to light-sensitive films (Fuji).  In the end, the film was developed in a film-processing machine (Eastman Kodak).<br><br>
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Revision as of 16:01, 19 October 2009

Salt and Soap template

a

Western Blotting

Procedure:

1. Yeast transformed cells containing appropriate plasmids were grown in SCM with appropriate amino acids deleted and harvested at a cell density corresponding to an OD600 of a 10-fold dilution reaching 0.2. 2. 2× Laemmli’s buffer (20% v/v glycerol, 0.1M Tris-HCl pH 6.9, 4% SDS, 0.2% bromophenol blue, 10% mercaptoethanol) was added and yeast crude extracts were prepared by glass bead lysis and separated on 10% SDS-PAGE. 3. The 10% resolving gel and the 5% stacking gel were cast according to the method described in Molecular Cloning (Sambrook et al., 1989).Separation was performed on a Mini Protean 3 gel and transblot system (Biorad). Proteins were stacked at 60-80 volts in the stacking gel and resolved at 120-150 volts in the resolving gel. 4. The proteins were then transferred onto a nitrocellulose membrane (pore size 0.45 μm, Schleicher &Schuell) in electrophoretic blotting system (C.B.S. Scientific) by applying a constant current of 0.5 mA for 1.5 hours. 5. After transferring, the membrane was taken out and socked in Ponceau S solution (0.5% Ponceau S in 1% HAc) for 1 min. After rinsed with ddH2O and labeled with protein marker bands. 6. The membrane was destained with TBST buffer (10 mM Tris-HCl pH8.0, 150 mM NaCl, 0.05% v/v Tween-20) and blocked with 5% milk in TBST for 30 min. 7. Then the membrane was incubated with the primary antibody (mouse monoclonal antibody against Flag) for 1 hour at room temperature followed by 3 × 15 min washing with TBST. 8. The membrane was then incubated with secondary antibody (goat anti-mouse antibody conjugated with horseradish peroxidase) for 1 hour at room temperature followed by 3 × 15 min washing with TBST. 9. After that, the membrane was incubated in SuperSignal chemiluminescence substrate (Pierce) for 5 min and exposed to light-sensitive films (Fuji). In the end, the film was developed in a film-processing machine (Eastman Kodak).

HKUST

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