>1z73A (A:) observed residues (from ATOM records)
rtrvlilgvngfignhlterllredhyevygldigsdaisrflnhphfhfvegdisihse
wieyhvkkcdvvlplvaiatpieytrnplrvfeldfeenlriirycvkyrkriifpstae
vygmcsdkyfdedhsnlivgpvnkprwiysvskqlldrviwaygekeglqftlfrpfnwm
gprldnlnaarigssraitqlilnlvegspiklidggkqkrcftdirdgiealyriiena
gnrcdgeiinignpeneasieelgemllasfekhplrhhfppfagfrvvesvehrkpsir
nahrcldwepkidmqetidetldfflrtvdlt