10.12.2012 Views

Protein Protocols Protein Protocols

Protein Protocols Protein Protocols

Protein Protocols Protein Protocols

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

2-D TLE-TLC Mapping 545<br />

12. 0.25% Ninhydrin in acetone.<br />

13. XAR-5 film (Kodak or equivalent).<br />

14. Lightening Plus intensifying screens (DuPont or equivalent).<br />

3. Methods<br />

3.1. <strong>Protein</strong> Punfication<br />

3.1.1. SDS-PAGE<br />

Any protein purification procedure that results in 95–100% purity is suitable for<br />

peptide mapping. For analytical purposes, the discontinuous buffer, SDS-PAGE procedure<br />

is the best choice (1,2). SDS-PAGE provides apparent molecular-mass information,<br />

and the ability to probe SDS-PAGE-separated proteins by immunoblotting,<br />

helps ensure that the proper proteins are being studied.<br />

If the proteins to be compared are abundant (>100 µg), peptide fragments can be<br />

visualized following 2-D TLE-TLC by ninhydrin staining. Much smaller amounts<br />

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!