Anti-E4F1 antibodies are used in the immunodetection of the protein E4F transcription factor 1. In humans, the canonical protein has a reported length of 784 amino acid residues and a mass of 83.5 kDa. Its subcellular localization is in the nucleus and cytoplasm. It is ubiquitously expressed across many tissue types. E4F1 is believed to function as a a transcriptional repressor. Post-translational modifications have been described, including sumoylation, protein cleavage and phosphorylation. Synonyms for this target antigen include transcription factor E4F1, RING-type E3 ubiquitin transferase E4F1, p120E4F, p50E4F, putative E3 ubiquitin-protein ligase E4F1, and E4F. E4F1 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. Immunofluorescence is the most common application for the E4F1 antibodies listed below. Flow Cytometry and Western Blot are also common applications.