ATP-Binding Cassette Sub-Family B Member 4

**Definition:** An ATP-binding cassette, sub-family B protein that functions in translocating PHOSPHATIDYLCHOLINES from the inner to the outer leaflet of the canalicular membrane of the HEPATOCYTES.

**Tree numbers:** - D09.400.430.890.020.400.767 - D12.776.157.530.100.075.750 - D12.776.157.530.450.074.500.500.250.719 - D12.776.395.550.020.400.767 - D12.776.543.550.192.400.767 - D12.776.543.585.100.200.719 - D12.776.543.585.450.074.500.500.250.719

**Synonyms:** - Phosphatidylcholine Translocator ABCB4 - Multidrug Resistance Protein 2 - MDR2 Protein - P-Glycoprotein 2 - Pgp2 protein