>3isfD (D:) observed residues (from ATOM records)
mkgdkkviqhlnkilgneliainqyflhsrmwndwglkrlgaheyhesidemkhadklie
rilfleglpnlqdlgklligentqemlqcdlnlelkatkdlreaivhceqvhdyvsrdll
kdileseeehidyletqlgliqkvglenylqshmhed