. "0"^^ . . . "a special pigment found in the rods and cones of the retina"@en-us . "114234467"@en-us . . "photopigment"@en-us . "0"^^ . . "115089104"^^ . "15089104-n"^^ . . . "a special pigment found in the rods and cones of the retina"@en-us . "photopigment"^^ . .