Involved in vacuolar sequestration of glutathione S-conjugates. Together with abc4, required for accumulation of a red pigment (ade pigment) in the vacuole of a mutant affected in the adenine biosynthetic pathway. Cells lacking both abc2 and abc4 show sensitivity to cycloheximide (CHX) and 4-nitroquinoline oxide (4-NQO), and decreased accumulation of monochlorobimane-glutathione (MCIB-GS). Belongs to the ABC transporter superfamily. ABCC family. Conjugate transporter (TC 3.A.1.208) subfamily.