Abstract
The genes encoding alpha 1-antitrypsin (alpha 1AT; gene symbol PI) and corticosteroid-binding globulin (CBG) are part of a cluster of structurally related serine protease inhibitor (serpin) genes on human Chromosome (Chr) 14q32.1. This cluster also includes the genes encoding alpha 1-antichymotrypsin (AACT) and protein C inhibitor (PCI), as well as an alpha 1-antitrypsin-related sequence (ATR; gene symbol PIL). In this report we present a detailed restriction map of a 110-kb region of genomic DNA that includes the alpha 1AT, ATR, and CBG genes. Gene order in this interval is tel-alpha 1AT-ATR-CBG-cen, and all three genes are transcribed in a distal-to-proximal orientation. Within the gene cluster, ATR is approximately 12 kb downstream of alpha 1AT, and CBG is about 57 kb downstream of alpha 1AT. Repetitive DNA sequences have been mapped throughout the interval, and several new restriction site polymorphisms in the region are described.
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