ATP Binding Cassette Transporter, Subfamily B, Member 3

**Definition:** ATP-binding cassette, subfamily B, protein that functions in the transport of ANTIGENS from the CYTOPLASM to the ENDOPLASMIC RETICULUM for association with HISTOCOMPATIBILITY ANTIGENS CLASS I peptides. It functions as a heterodimer with ATP BINDING CASSETTE TRANSPORTER, SUBFAMILY B, MEMBER 2.

**Tree numbers:** - D09.400.430.890.020.400.458 - D12.776.157.530.100.075.500 - D12.776.157.530.450.074.500.500.250.375 - D12.776.395.550.020.400.458 - D12.776.543.550.192.400.458 - D12.776.543.585.100.200.375 - D12.776.543.585.450.074.500.500.250.375

**Synonyms:** - ATP-Binding Cassette, Sub-Family B, Member 3 - Peptide Supply Factor 2 - Antigen Peptide Transporter-2 - ABCB3 Protein - ATP Binding Cassette Transporter, Sub-Family B, Member 3 - Peptide Transporter Tap2