Anti-NKX1.1 antibodies enable researchers to detect and measure the NKX1.1 antigen in biological samples. This target is a reported synonym of the NKX1-1 gene, which encodes NK1 homeobox 1. This protein is known to function in cell differentiation and the regulation of transcription, among other biological roles. The human version of NKX1.1 has a canonical amino acid length of 448 residues and a protein mass of 44 kilodaltons. It is reported to be localized in the nucleus of cells. NKX1.1 is a member of the NK-1 homeobox protein family.