Multi-camera Simultaneous Total Internal Reflection and Interference Reflection Microscopy.

Area of Science:

• Biophysics
• Cell Biology
• Optical Microscopy

Background:

• Interference Reflection Microscopy (IRM) images microtubules using reflected light interference.
• Simultaneous imaging of microtubules and interacting proteins is often desired.
• Existing methods may lack the capability for simultaneous high-speed imaging of both.

Purpose of the Study:

• To develop a simple, cost-effective modification for standard multi-color TIRF microscopes.
• To enable simultaneous high-speed IRM and single-molecule TIRF imaging.
• To visualize microtubules and their interacting proteins concurrently.

Main Methods:

• Modification of a standard multi-color TIRF microscope.
• Implementation of separate cameras for IRM and TIRF channels.
• Independent optimization of camera parameters for each modality.
• Imaging unlabeled microtubules and GFP-labeled EB1 protein.

Main Results:

• Achieved simultaneous high-speed IRM and single-molecule TIRF imaging.
• Demonstrated visualization of unlabeled microtubules.
• Successfully imaged GFP-labeled EB1 protein forming comets on microtubule tips.
• The design is easily implemented with minimal cost.

Conclusions:

• The modified microscope enables simultaneous IRM and TIRF imaging.
• This technique provides a valuable tool for studying microtubule dynamics and protein interactions.
• The accessibility of this design can benefit many research laboratories.