>4xz0A (A:) observed residues (from ATOM records)
hmpdpaahlpffygsisraeaeehlklagmadglfllrqclrslggyvlslvhdvrfhhf
pierqlngtyaiaggkahcgpaelcefysrdpdglpcnlrkpcnrpsglepqpgvfdclr
damvrdyvrqtwklegealeqaiisqapqvekliattahermpwyhssltreeaerklys
gaqtdgkfllrprkeqgtyalsliygktvyhylisqdkagkycipegtkfdtlwqlveyl
klkadgliyclkeacpns