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Microvolume Protein Concentration Determination using the NanoDrop 2000c Spectrophotometer
Published on: November 4, 2009
Validation of the drop coating deposition Raman method for protein analysis
Corasi Ortiz1, Dongmao Zhang, Yong Xie
1Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA.
Analytical Biochemistry
|May 6, 2006
Summary
Drop coating deposition Raman (DCDR) spectroscopy reliably detects protein changes without laser damage. This technique accurately assesses protein conformation, binding, and purity across various sample conditions.
Area of Science:
- Biophysical Chemistry
- Spectroscopy
- Protein Analysis
Background:
- Drop coating deposition Raman (DCDR) spectroscopy is a technique for analyzing proteins.
- Understanding the limits of DCDR is crucial for its reliable application in protein studies.
Purpose of the Study:
- To critically evaluate the capabilities and limitations of DCDR spectroscopy.
- To determine DCDR's effectiveness in detecting changes in protein conformation, binding, and purity.
Main Methods:
- Utilizing difference spectroscopy to assess DCDR spectral reproducibility.
- Investigating DCDR under varying experimental conditions, including sample volume, concentration, and water content.
Main Results:
- Confirmed the absence of laser-induced thermal or photochemical damage during DCDR.
- Demonstrated high reproducibility of DCDR spectra across different sample volumes and concentrations.
- Characterized the water content of DCDR protein deposits and their spectral features.
- Found significant similarity between solution Raman spectra and DCDR spectra.
Conclusions:
- DCDR spectroscopy is a robust method for analyzing protein conformation, binding, and purity.
- The technique is reproducible and does not induce sample damage under typical conditions.
- DCDR spectra provide valuable insights comparable to solution-based Raman spectroscopy.
