Phenolsulfonphthalein: Red dye, pH indicator, and diagnostic aid for determination of renal function. It is used also for studies of the gastrointestinal and other systems.Phenolphthaleins: A family of 3,3-bis(p-hydroxyphenyl)phthalides. They are used as CATHARTICS, indicators, and COLORING AGENTS.Rats, Inbred LEC: A cinnamon-colored strain of Long-Evans rats which carries a mutation causing fulminant hepatitis and jaundice, with an associated gross accumulation of copper in the liver. This strain is a model for Wilson's Disease (see HEPATOLENTICULAR DEGENERATION).Organic Anion Transporters, ATP-Dependent: A subclass of ORGANIC ANION TRANSPORTERS whose transport of organic anions is linked directly to the hydrolysis of ATP. The subclass includes those ATP-BINDING CASSETTE TRANSPORTERS that transport organic ions.