>3nzxS (S:) observed residues (from ATOM records)
frnnydgdtvtfsptgrlfqveyaleaikqgsvtvglrsnthavlvalkrnadelssyqk
kiikcdehmglslaglapdarvlsnylrqqcnysslvfnrklaveraghllcdkaqkntq
syggrpygvglliigydksgahllefqpsgnvtelygtaigarsqgaktylertldtfik
idgnpdelikagveaisqslrdesltvdnlsiaivgkdtpftiydgeavakyi