Photoreceptors are photosensing proteins that respond to the surrounding light environment aroun. Upon light absorption, photorceptors can go through large scale conformational changes, which happen via several intermediates over multiple timescales. Many studies have been done, and the sutdy of photoreceptors can to characterize the transient structural deformation of a protein environment that propagates and initiates the signal transduction pathways.
- Chemistry of Vision
- Vision is such an everyday occurrence that we seldom stop to think and wonder how we are able to see the objects that surround us. Yet the vision process is a fascinating example of how light can produce molecular changes. The retina contain the molecules that undergo a chemical change upon absorbing light, but it is the brain that actually makes sense of the visual information to create an image.
- Photoreceptor Excitation
- Upon excitation from a laser or other light energy source, photoreceptor molecules transition from a lower energy state to a higher energy state. During this process, electrons of photoreceptor absorbs the energy, and turn into excited state therefore change photoreceptors form. Now, let's see the basic concept of excitation of electrons.
- Photoreceptor Proteins
- Photoreceptor proteins are light-sensitive proteins involved in the sensing and response to light in a variety of organisms. Photoreceptor proteins can be find in both animals and plants. Human eye retina is a good example of photoreceptor protein. Many bacteria, such as halohodospira halophila, an extremophile bacterium contain Photoactive Yellow Protein.
- Vision and Light
- Eyes receive light energy then transfer and passing the energy into neural impulses to brain. This page will show the role of light plays in vision.