The function of SLC7A2 (solute carrier family 7 member 2, ENSG00000003989) is as follows. Functions as a permease involved in the transport of the cationic amino acids (L-arginine, L-lysine, L-ornithine and L- homoarginine); the affinity for its substrates differs between isoforms created by alternative splicing (PubMed:28684763, PubMed:9174363). May play a role in classical or alternative activation of macrophages via its role in arginine transport (By similarity). {ECO:0000250|UniProtKB:P18581, ECO:0000269|PubMed:28684763, ECO:0000269|PubMed:9174363}. [Isoform 1]: Functions as a permease that mediates the transport of the cationic amino acids (L-arginine, L-lysine, L- ornithine and L-homoarginine). Shows a much higher affinity for L- arginine and L-homoarginine than isoform 2. . [Isoform 2]: Functions as a low-affinity, high capacity permease involved in the transport of the cationic amino acids (L- arginine, L-lysine, L-ornithine and L-homoarginine). .