ARRB2 and retinal degeneration: Preventing the formation of stable Rh1-Arr2 complexes by red light slows down the retinal degeneration in trpCM and trp343 mutants comparable to the trp1 degeneration in white light, suggesting that the endocytosis of Rh1-Arr2 complexes contributes retinal degeneration in trp mutants and different results are attributable in part to the allelic differences.