Mitochondrial S-adenosyl-L-methionine/S-adenosyl-L-homocysteine antiporter. Mediates the exchange of cytosolic S-adenosyl-L-methionine, the predominant methyl-group donor for macromolecule methylation processes, for mitochondrial S-adenosylhomocysteine(SAH), a by-product of methylation reactions.
Subcellular locations: Mitochondrion inner membrane
Widely expressed. Highly expressed in testis, with moderate expression in brain, heart, kidney, lung, skeletal muscle, pancreas, small intestine and liver, and low expression in spleen.