Small Molecule Immunosensing Using Surface Plasmon Resonance

Small Molecule Immunosensing Using Surface Plasmon Resonance

Surface plasmon resonance (SPR) biosensors utilize refractive index changes to sensitively detect mass changes at noble metal sensor surface interfaces. As such, they have been extensively applied to immunoassays of large molecules, where their high mass and use of sandwich immunoassay formats can result in excellent sensitivity. Small molecule immunosensing using SPR is more challenging. It re...

Subunit and small-molecule interaction of ribonucleotide reductases via surface plasmon resonance biosensor analyses

Ribonucleotide reductase (RNR) synthesizes deoxyribonucleotides for DNA replication and repair and is controlled by sophisticated allosteric regulation involving differential affinity of nucleotides for regulatory sites. We have developed a robust and sensitive method for coupling biotinylated RNRs to surface plasmon resonance streptavidin biosensor chips via a 30.5 A linker. In comprehensive s...

Surface plasmon resonance biosensor

Imaging surface plasmon resonance

The central theme of this thesis is the use of imaging Surface Plasmon Resonance (iSPR) as a tool in the characterization of surfaces with laterally varying properties. Within the scope of this work, an instrument for iSPR analysis was designed and built. SPR is a very sensitive technique for monitoring changes in optical properties in the immediate vicinity of a sensor surface, which is very u...

Surface plasmon resonance

4. LIGAND 10 4.1. Direct versus indirect immobilisation 10 4.2. Covalent immobilisation 11 4.2.1. A general approach 11 4.2.2. Choice of chemistry 12 4.2.3. Prepare the protein 12 4.2.4. Pre-concentration 12 4.2.5. Amine coupling 14 4.2.6. Regeneration 15 4.2.7. Adjusting the immobilisation conditions. 16 4.3. Non-covalent immobilisation (ligand capture) 16 4.3.1. Using an existing strategy 17 ...