Anti-CDX1 antibodies are used in the immunodetection of the protein caudal type homeobox 1. In humans, the canonical protein has a reported length of 265 amino acid residues and a mass of 28.1 kDa. Its subcellular localization is in the nucleus. Alternative splicing is reported to yield 2 different isoforms for this protein. A member of a the Caudal homeobox protein family, CDX1 is reported to play a role in in transcriptional regulation. Synonyms for this target antigen include caudal type homeo box transcription factor 1, caudal type homeobox transcription factor 1, caudal-type homeobox protein 1, caudal-type homeobox protein CDX1, and homeobox protein CDX-1.