The Tag:Mito(LACTB-Unk) entry in FlyBase represents a mitochondrial localization sequence for the intermembrane space (IMS), where it is known that the sequence (MYRLLSSVTARAAATAGPAWDGGRRGAHRRPGLPVLGLGWAGGLGLGLGLALGAKLVVGLRGAVPIQS) originated from a LACTB gene, but the species of origin is unknown.