 As well as expression in the liver, OATPs are expressed in many other tissues on basolateral and apical membranes, transporting anions, as well as neutral and even cationic compounds.They also transport an extremely diverse range of drug compounds, ranging from anti-cancer, antibiotic, lipid lowering to anti-diabetic drugs, as well as toxins and poisons.Various anti-cancer drugs like pazopanib, vandetanib, nilotinib, canertinib and erlotinib are known to be transported via OATPs (OATP-1B1 and OATP-1B3).