>1z3aA (A:) observed residues (from ATOM records)
sevefsheywmrhaltlakrawderevpvgavlvhnnrvigegwnrpigrhdptahaeim
alrqgglvmqnyrlidatlyvtlepcvmcagamihsrigrvvfgardaktgaagslmdvl
hhpgmnhrveitegiladecaallsdffrmrrqeik