Exon/intron organization and complete nucleotide sequence of an HLA gene.

Abstract
A genomic clone was isolated and the sequence was determined containing the gene for a human class I transplantation antigen. The gene contains 7 exons. The first 5 exons code respectively for a signal peptide, for the 1st, 2nd and 3rd extracellular domains of the protein molecule and for the transmembrane region. The cytoplasmic segment is encoded by part of the 5th and the 6th and the 7th exons. The structure of the protein encoded by this unit is closely homologous with known class I transplantation antigens.