104339-66-4 AIDS-084959 AIDS084959 DSHAKRHHGYKRKFHEKHHSHRGY H-Asp-Ser-His-Ala-Lys-Arg-His-His-Gly-Tyr-Lys-Arg-Lys-Phe-His-Glu-Lys-His-His-Ser-His-Arg-Gly-Tyr-OH Histatin-5 Histidine-rich peptide Hsn-5