Unit 3109: Biophysical Techniques in Biological Research

1. Introduction to Biophysical Techniques

• Overview of biophysical methods in biological research
• Importance of studying structure, function, and interactions of biomolecules
• Classification of biophysical techniques
• Historical perspective and recent advances

2. Spectroscopic Techniques in Biophysics

2.1 UV-Visible (UV-Vis) Spectroscopy

• Principles of electronic absorption
• Instrumentation and sample requirements
• Applications to protein and nucleic acid analysis

2.2 Fluorescence Spectroscopy

• Fluorescence fundamentals: excitation, emission, and quantum yield
• Fluorescent probes and labeling techniques
• Time-resolved and steady-state fluorescence
• Applications in studying conformational changes and interactions

2.3 Circular Dichroism (CD) Spectroscopy

• Principles of optical activity and chiral molecules
• CD instrumentation and experimental design
• Analysis of secondary structure in proteins
• Monitoring folding and conformational changes

3. X-ray Crystallography

• Fundamentals of X-ray diffraction
• Crystallization of biological macromolecules
• Data collection and processing
• Phase problem and structure determination
• Model building and refinement
• Applications in determining 3D structures of proteins and nucleic acids

4. Nuclear Magnetic Resonance (NMR) Spectroscopy

• Basic principles of NMR and magnetic properties of nuclei
• Chemical shift, spin-spin coupling, and relaxation
• Multidimensional NMR techniques
• Sample preparation for biomolecular NMR
• Studying structure, dynamics, and interactions of proteins and nucleic acids

5. Mass Spectrometry in Biophysics

• Ionization techniques (MALDI, ESI)
• Mass analyzers and detectors
• Analysis of biomolecular mass-to-charge ratio
• Applications in protein identification, post-translational modifications, and complex formation

6. Surface Plasmon Resonance (SPR) Spectroscopy

• Physical principles of SPR
• Instrumentation and sensor chip design
• Measuring biomolecular interactions in real-time
• Kinetic and affinity analysis of protein-protein and protein-ligand binding

7. Microscopy Techniques in Biophysics

7.1 Electron Microscopy (EM)

• Transmission EM and Scanning EM principles
• Sample preparation and staining
• Cryo-EM and its revolution in structural biology

7.2 Confocal Microscopy

• Optical sectioning and fluorescence imaging
• Applications in live cell imaging

7.3 Super-Resolution Microscopy

• Techniques (STED, PALM, STORM)
• Overcoming diffraction limits
• Visualization of molecular details in cells

8. Calorimetry Methods in Biophysical Studies

8.1 Differential Scanning Calorimetry (DSC)

• Principles of heat capacity measurements
• Thermal stability and folding studies

8.2 Isothermal Titration Calorimetry (ITC)

• Measuring binding thermodynamics
• Enthalpy, entropy, and stoichiometry determination

9. Single-Molecule Techniques

• Overview and significance
• Techniques: single-molecule fluorescence, optical tweezers, atomic force microscopy
• Real-time observation of biomolecular behavior
• Applications in folding, interactions, and enzymatic activity

10. Data Analysis and Interpretation in Biophysics

• Common software tools and data processing methods
• Statistical analysis and error estimation
• Interpretation of spectroscopic, crystallographic, and calorimetric data
• Case studies illustrating data-driven conclusions