Structure of the gene for mBD1. Restriction map of the gene for mBD-1 together with a schematic drawing of the gene, the cDNA, and the predicted structure of the prepropeptide. The gene is represented schematically with the following individual components: 5′ untranslated region (5′ UTR), open box; signal sequence, shaded box; interrupted prosequence (PRO), black box; mature peptide, shaded box; 3′ untranslated region (3′ UTR), open box.