Description of target: Photoreceptor required for image-forming vision at low light intensity. Required for photoreceptor cell viability after birth. Light-induced isomerization of 11-cis to all-trans retinal triggers a conformational change that activates signaling via G-proteins. Subsequent receptor phosphorylation mediates displacement of the bound G-protein alpha subunit by the arrestin SAG and terminates signaling. ;Species reactivity: Mouse;Application: ;Assay info: Assay Methodology: Quantitative Sandwich ELISA;Sensitivity: < 0.059 ng/mL