Manipulating DNA and RNA
DNA hybridization
PCR
PCR Movie
PCR Applications
PCR Applications Forensic Science
DNA Cloning
DNA cloning and amplification
Protein Production by DNA Cloning
Gene Mutation
Digestion and Destroy
Localization or Amplification of proteins by DNA Cloning
Detection of protein interactions by DNA Cloning
Yeast two-hybrid system
Identify Tumor Biomarkers by DNA Cloning Phage display
Northern and Southern Blots RNA and DNA Detection
Northern and Southern Blots
Microarray
SDS and b-mercaptoethanol for Electrophoresis
SDS PAGE I
SDS PAGE II
SDS PAGE III
Western Blot
Visualizing Cells
Resolving Power
Light Microscope
Interference between light waves
Resolution Calculation
Two ways to get contrast
Four Types of light microscopy Bright field, phase contrast, differential interference contrast, Dark-field microscopy
Fluorescence Microscope
Fluorescent Dyes
Fluorescent image Blue: DNA; Green: microtubules; Red: centrimere
Immunofluorescence
Immunostaining
Confocal Fluorescence Microscopy
The difference between conventional and confocal microscopes
3D reconstruction from confocal images
Transmission Electron microscopy (TEM, resolution nm)
A root-tip cell under electromicroscopy
The scanning electron microscope (SEM)
Stereocillia from a hair cell
Live Cell Imaging
Green Fluorescence Protein (GFP)
Jellyfish and GFP Osamu Shimomura Noticed GFP in 1962
Dr. Douglas Prasher
Martin Chalfie
Sergey A. Lukyanov The Discovery of DsRed
Roger Y. Tsien
Track Molecular Motions
Passive Applications of GFP GFP-microtubules GFP-Actin CFP-Actin/YFP-Microtubules GFP-Actin
Spy on their Actions! FRET
The Principle of Fluorescence Resonance Energy Transfer (FRET) When the fluorophores are far apart: No FRET ExcitationEmission When fluorophores are close: FRET occurs ExcitationEmission FRET
FRET-Based Biosensors Calcium Ras and Rap1 Miyawaki, et al 1997, Nature Mochizuki, et al 2001, Nature Ting, et al 2001, PNAS Tyrosine Kinases
Design Strategy Weak FRET Phosphatase Strong FRET 433 nm 527 nm 433 nm 490 nm ECFP (1-227) SH2 (from c-Src) SubstrateEYFP Linker Src Activation
The Src reporter with CFP and YFP monomers ECFP (1-227) SH2 (from c-Src) SubstrateEYFP Linker A206K