>1z74A (A:) observed residues (from ATOM records)
rtrvlilgvngfignhlterllredhyevygldigsdaisrflnhphfhfvegdisihse
wieyhvkkcdvvlplvaiatpieytrnplrvfeldfeenlriirycvkyrkriifpstse
vygmcsdkyfdedhsnlivgpvnkprwiysvskqlldrviwaygekeglqftlfrpfnwm
gprldnlnaarigssraitqlilnlvegspikligkqkrcftdirdgiealyriienagn
rcdgeiinignpeneasieelgemllasfekhplrhhfppfagfrvehykpsirnahrcl
dwepkidmqetidetldfflrtvdlt