>3isfC (C:) observed residues (from ATOM records)
kgdkkviqhlnkilgneliainqyflhsrmwndwglkrlgaheyhesidemkhadklier
ilfleglpnlqdlgklligentqemlqcdlnlelkatkdlreaivhceqvhdyvsrdllk
dileseeehidyletqlgliqkvglenylqshmhed