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opsin
Opsin refers to a specialized class of G protein-coupled receptors that serve as the structural scaffold for visual pigments. It is a technical term used almost exclusively in biochemistry, ophthalmology, and neuroscience to describe the protein component that determines the spectral sensitivity of a photoreceptor cell.
Because it is a specific biological molecule, the term is used in a scientific context to explain how light is transduced into electrical signals in the eye. It is distinct from the complete pigment (like rhodopsin), as opsin is the protein part that remains after the chromophore, retinal, has been bleached or dissociated.
Ý nghĩa
Ví dụ
The researcher studied how different types of opsin respond to various wavelengths of light.
Opsin proteins are essential for the process of phototransduction in the eye.
I wonder if some animals have a unique form of opsin that allows them to see infrared light.
The binding of retinal to opsin creates the visual pigment necessary for sight.
Genetic mutations in the opsin gene can lead to various forms of color blindness.
Let us examine the molecular structure of opsin under the microscope.
The specific amino acid sequence of the opsin determines which color of light is detected.
Opsin is a G protein-coupled receptor that triggers a chemical signal upon light absorption.