May be a carrier that transport small solutes by using chemiosmotic ion gradients. Sorting to lysosomes involves tyrosine- and/or dileucine-based motifs. Expressed at very low levels in all tissues tested. The disease is caused by variants affecting the gene represented in this entry. The disease is caused by variants affecting the gene represented in this entry. May be produced at very low levels due to a premature stop codon in the mRNA, leading to nonsense-mediated mRNA decay. Belongs to the major facilitator superfamily. Neural Ceroid Lipofuscinoses mutation db