Anti-LAPTM4B antibodies are used in the immunodetection of the protein lysosomal protein transmembrane 4 beta. In humans, the canonical protein has a reported length of 317 amino acid residues and a mass of 35.1 kDa. Its subcellular localization is in the lysosomes and cell membrane. Up to 2 different isoforms have been reported for this protein. A member of the LAPTM4/LAPTM5 transporter protein family, Laptm4b is known to be required for optimal lysosomal function. Post-translational modifications have been described, including ubiquitination and protein cleavage. Synonyms for this target antigen include LC27, lysosomal-associated transmembrane protein 4B, lysosomal associated protein transmembrane 4 beta, lysosome-associated transmembrane protein 4-beta, and LAPTM4beta. LAPTM4B gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. A number of Laptm4b antibodies have been mentioned in research publications and have associated citations. Western Blot is a widely used application for these antibodies. In addition, ELISA is also a common application.