Loss of all-trans-retinal (atRAL) is followed by dissociation of arrestin (SAG) from p-RHO. RHO is then available for covalent binding to 11-cis-retinal (11cRAL), supplied by the retinal pigment epithelium, to regenerate rhodopsin. SAG is capable of binding weakly to rhodopsin, so the dissociation in some rhodopsins may occur after regeneration (Baumann & Bender 1973).
Baumann, C, Bender, S
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