>4cr2F (F:) observed residues (from ATOM records)
frnnydgdtvtfsptgrlfqveyaleaikqgsvtvglrsnthavlvalkrnadelssyqk
kiikcdehmglslaglapdarvlsnylrqqcnysslvfnrklaveraghllcdkaqkntq
syggrpygvglliigydksgahllefqpsgnvtelygtaigarsqgaktylertldtfik
idgnpdelikagveaisqslrdesltvdnlsiaivgkdtpftiydgeavakyi