Arrestin
Synonyms
Retinal S Antigen
Retinal S-Antigen
S Antigen, Retinal
S-Antigen, Retinal
A 48-Kd protein of the outer segment of the retinal rods and a component of the phototransduction cascade. Arrestin quenches G-protein activation by binding to phosphorylated photolyzed rhodopsin. Arrestin causes experimental autoimmune uveitis when injected into laboratory animals.