Good Antibody for Detecting GFP

Cell, Molecular and Cancer Biology
University of Massachusetts Medical School
Post Doctoral Research Associate

Overall

Quality of Results

Ease-of-Optimization

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Company:

BioLegend

Product Name:

Purified anti-GFP Epitope Tag Antibody

Catalog Number:

902601

Info: View Product View Product Specs

Browse Similar Products: GFP Antibodies

The aim of this experiment was to study the phosphorylation of Rb-analog, Whi5 in budding yeast after release from G1 arrest caused by pheromones. Whi5 was expressed as a C-terminal GFP tagged protein and its phosphorylation was detected by electrophoretic mobility shift in SDS-PAGE.

Experimental Design and Results Summary

Applications

Western Blot

Sample

Cell Lysates from budding yeast

Primary Incubation

1:200 Dilution in 5% Milk (TTBS), overnight incubation in cold room

Blocking Agent

5% non-fat milk in TBS-T

Secondary Incubation

Anti-Mouse-HRP, 1:3000, 1hour incubation at Room Temperature

Tertiary Incubation

None

Detection

Bio-Rad Clarity HRP substrate

Results Summary

Protein extract from cells was prepared in TCA lysis buffer supplied with PMSF, protease inhibitor mixture, and sodium orthovanadate. Lysates were quantified using a BCA assay kit (Thermos). 20 micrograms of proteins were subjected to SDS-PAGE and transferred onto PVDF membranes and blocked with 5% non-fat milk in TBS-T (20 mMTris, 500 mMNaCl, and 0.1% Tween 20) at room temperature for 1 h with rocking. The membranes were probed with primary Antibody (1/200 dilution) overnight at 4°C. After washing with TBS-T, the membranes were incubated with HRP-conjugated secondary Antibodies in 5% non-fat milk/TBS-T at room temperature for 1 h. The protein–Antibody complex was detected by Bio-Rad Clarity ECL substrate. The antibody detected endogenously GFP-tagged Whi5 as higher exposures (5-10min).

Additional Notes

Works much better with overexpressed proteins

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Summary

The Good

One of the very few good anti-GFP antibodies around

The Bad

Not very strong with endogenously tagged proteins

The Bottom Line

I would use this for GFP detection in a variety of cell types for Western blot

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