>3isfA (A:) observed residues (from ATOM records)
kgdkkviqhlnkilgneliainqyflhsrmwndwglkrlgaheyhesidemkhadklier
ilfleglpnlqdlgklligentqemlqcdlnlelkatkdlreaivhceqvhdyvsrdllk
dileseeehidyletqlgliqkvglenylqshmhe