Related Experiment Video
Updated: May 31, 2026
07:58
A Polyaniline-based Sensor of Nucleic Acids
Published on: November 1, 2016
A simple strategy for charge selective biopolymer sensing.
Amit K Ghosh1, Prasun Bandyopadhyay
1Unilever R&D Bangalore, 64 Main Road, Whitefield, Bangalore 560066, India.
Chemical Communications (Cambridge, England)
|July 12, 2011
Summary
This study shows how specific polysaccharides can turn on quenched protein fluorescence. This fluorescence recovery occurs at ultra-low concentrations for bovine serum albumin and pepsin, indicating sensitive detection methods.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Materials Science
Background:
- Protein fluorescence quenching is a common phenomenon.
- Polysaccharides can interact with proteins and micelles.
- Developing sensitive protein detection methods is crucial.
Purpose of the Study:
- To investigate polysaccharide-induced "turn-on" fluorescence responses in proteins.
- To explore the selective recovery of quenched fluorescence for specific protein-polysaccharide-micelle systems.
- To determine the detection limits for bovine serum albumin and pepsin.
Main Methods:
- Utilized fluorescence spectroscopy to monitor protein fluorescence.
- Employed sodium carboxy methyl cellulose (SCMC) and chitosan (CS) as polysaccharides.
- Used similarly charged micelles at pH ~3 to induce interactions.
- Tested bovine serum albumin (BSA) and pepsin (PS) as model proteins.
Main Results:
- Achieved selective "turn-on" fluorescence recovery for BSA with SCMC and PS with CS.
- Demonstrated ultra-low detection concentrations: 0.04 μM for BSA and 0.008 μM for PS.
- Observed fluorescence recovery is dependent on the specific polysaccharide-protein interaction.
Conclusions:
- Polysaccharide-micelle interactions can selectively restore quenched protein fluorescence.
- This "turn-on" fluorescence approach offers highly sensitive detection for specific proteins.
- The findings have implications for developing novel biosensing platforms.
