Putative mitochondrial carrier of unknown solute specificity. Required for gas-filling of the tracheal system at hatching time of the embryo and for normal epithelial morphogenesis of the wings. Expressed both maternally and zygotically during all developmental stages. Flies display defects in the unfolding and expansion of the wings resulting in a loss of venation and a marked decrease in their size. Lethality is polyphasic with flies dying during early larval development and displaying apparently collapsed tracheal trees. Belongs to the mitochondrial carrier (TC 2.A.29) family.