>1x3zA (A:) observed residues (from ATOM records)
nnidfdsiakmllikykdfilskfkkaapvenirfqnlvhtnqfaqgvlgqsqhlctvyd
npswhsivletldldliyknvdkefakdghaegeniytdylvkellryfkqdffkwcnkp
dcnhcgqntsenmtplgsqgpngeeskfncgtveiykcnrcgnitrfpryndpiklletr
kgrcgewcnlftlilksfgldvryvwnredhvwceyfsnflnrwvhvdsceqsfdqpyiy
sinwnkkmsyciafgkdgvvdvskryilqnelprdqikeedlkflcqfitkrlryslndd
eiyqlacrdeqeqielirgk