>1p73A (A:) observed residues (from ATOM records)
mvtivriyldgvygigksttgrvmassptlyfpepmaywrtlfetdvisgiydtqnrkvd
daalitahyqsrfttpylilhdhtctlfggnslqrgtqpdltlvfdrhpvastvcfpaar
yllgdmsmcalmamvatlprepqggnivvttlnveehirrlrtrarigeqiditliatlr
nvyfmlvntchflrsgrvwrdgwgelptscgaykhratqmdafqervspelgdtlfalfk
tqellddrgvilevhawaldalmlklrnlnvfsadlsgtprqcaavvesllplmsstlsd
fdsasaleraartfnaemgv