<prompt> The following features differentiate Rotor syndrome from Dubin Johnsons syndrome except:Liver patients with Rotor syndrome has no increased pigmentation and appears normalIn Rotor syndrome, gall bladder is usually visualized on cholecystographyTotal urinary coproporphyrin is substantially increased in Rotor syndromeFraction of coproporphyrin I in urine is elevated usually more than 80 of the total in Rotor syndrome  <response>: Rotor syndrome Dubin Johnsons syndrome Appearance of liver Normal appearance Liver has black pigmentation Gall bladder visualization on oral cholecystography Gallbladder is usually visualized Gall bladder cant be visualized Total urine coproporphyrin content High with 70 coproporphyrin I Normal with 80 coproporphyrin I 