Deduced amino acid sequences of human HCA-1 and rat HCA aligned with chicken BEN/SC1/DM-GRASP. The single letter amino acid code is used. HCA-2 differed from HCA-1 by a deletion of 13 amino acids between positions 503-516 (▾). Stars denote conserved cysteine residues and conserved potential N-linked glycosylation sites are shaded. The predicted transmembrane domain is boxed. The positions of the oligonucleotides used for the cDNA cloning are shown (asterisks).