Ultrafast Transient Absorption Spectra and Kinetics of Rod and Cone Visual Pigments.

ABSTRACT: Rods and cones are the photoreceptor cells containing the visual pigment proteins that initiate visual phototransduction following the absorption of a photon. Photon absorption induces the photochemical transformation of a visual pigment, which results in the sequential formation of distinct photo-intermediate species on the femtosecond to millisecond timescales, whereupon a visual electrical signal is generated and transmitted to the brain. Time-resolved spectroscopic studies of the rod and cone photo-intermediaries enable the detailed understanding of initial events in vision, namely the key differences that underlie the functionally distinct scotopic (rod) and photopic (cone) visual systems. In this paper, we review our recent ultrafast (picoseconds to milliseconds) transient absorption

SUBMITTER: Krishnamoorthi A 

PROVIDER: S-EPMC10421382 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature