Mitochondrial basic amino acids transporter (SLC25A29)

Transports arginine, lysine, homoarginine, methylarginine and, to a much lesser extent, ornithine and histidine (PubMed:24652292). Can restore ornithine transport in cells lacking the primary mitochondrial ornithine transporter SLC25A15 (PubMed:19287344).

Doesn't transport carnitine nor acylcarnitines (PubMed:24652292). Functions by both counter- exchange and uniport mechanisms (PubMed:24652292).