Anti-HBE1 antibodies are used in the immunodetection of the protein hemoglobin subunit epsilon 1. In humans, the canonical protein has a reported length of 147 amino acid residues and a mass of 16.2 kDa. The HBE1 protein is a member of the Globin protein family. Synonyms for this target antigen include hemoglobin subunit epsilon, epsilon globin, hemoglobin epsilon chain, hemoglobin, epsilon 1, and HBE.