Fig. 3. Human β-defensin model. 3-D model of human β-defensin (HBD-1) showing spatial arrangement of its 36 amino acids. Disulfide bonds between six cysteine residues are shown as black bars. Using standard nomenclature, the amino acid sequence of HBD-1, from N terminus to C terminus is: DHYNCVSSGGQCLYSACPIFTKIQGTCYRGKAKCCK. [GenBank Accession #CAA90650]