Related Experiment Videos
New immobilization chemistry for probe affinity mass spectrometry
1Complex Carbohydrate Research Center, University of Georgia, Athens 30602-4712, USA.
Rapid Communications in Mass Spectrometry : RCM
|January 1, 1996
Summary
New probe affinity mass spectrometry (PAMS) chemistry significantly enhances analyte capture. By immobilizing binding molecules onto dextrans, PAMS probes offer 500 times more binding sites for improved mass spectrometry analysis.
Area of Science:
- Analytical Chemistry
- Biochemistry
- Biotechnology
Background:
- Probe affinity mass spectrometry (PAMS) combines affinity separation with MALDI-MS.
- Initial PAMS chemistry had limited binding capacity due to monolayer formation.
Purpose of the Study:
- To develop novel PAMS immobilization chemistries for increased analyte capture.
- To overcome the limitations of monolayer-based binding site density.
Main Methods:
- Developed a new PAMS chemistry utilizing high molecular weight dextrans (approx. 500,000) on MALDI probes.
- Immobilized binding molecules (antibodies, lectins, receptors) onto the probe-bound dextrans.
- Compared binding capacity with original PAMS monolayer chemistry.
Main Results:
- The new dextran-based PAMS chemistry provides approximately 500 times more analyte binding sites.
- This approach allows for significantly higher analyte capture and concentration.
- The chemistry is versatile, applicable to binding molecules with primary amines.
Conclusions:
- Enhanced PAMS immobilization chemistry dramatically increases probe binding capacity.
- This advancement enables more sensitive and efficient MALDI-MS analysis.
- The versatile chemistry supports a broad range of PAMS applications.