Anti-lipid droplet assembly factor 1 antibodies are used for the immunodetection of the protein encoded by the LDAF1 gene. In humans, the canonical protein has a reported length of 161 amino acid residues and a mass of 17.5 kDa. Its subcellular localization is in the ER. Alternative splicing is reported to yield 2 different isoforms for this protein. It is notably expressed at high levels in the heart and skeletal muscle. A member of the LDAF1 protein family, it is known to play an important role in the formation of lipid droplets (LD) which are storage organelles at the center of lipid and energy homeostasis. Other names for this target antigen include PROMETHIN and transmembrane protein 159. Gene orthologs have been identified in the mouse, rat, bovine, frog, chimpanzee and chicken species.