Anti-fms related receptor tyrosine kinase 3 ligand antibodies are used for the immunodetection of the protein encoded by the FLT3LG gene. In humans, the canonical protein has a reported length of 235 amino acid residues and a mass of 26.4 kDa. Its subcellular localization is in the cell membrane and is secreted. Alternative splicing is reported to yield 3 different isoforms for this protein. It is noted to be involved in the regulation of cell proliferation and signal transduction pathways. Post-translational modifications have been described, including glycosylation. Other names for this target antigen include FLG3L, FLT3L, fms-related tyrosine kinase 3 ligand, flt3 ligand, fms related tyrosine kinase 3 ligand, and FL. Gene orthologs have been identified in the mouse, rat, bovine, frog and chimpanzee species.