>1xyfB (B:) observed residues (from ATOM records)
aestlgaaaaqsgryfgtaiasgklgdsayttiasrefnmvtaenemkidatepqrgqfn
fsagdrvynwavqngkqvrghtlawhsqqpgwmqslsgstlrqamidhingvmghykgki
aqwdvvneafsddgsggrrdsnlqrtgndwievafrtaraadpaaklcyndynienwtwa
ktqgvynmvrdfkqrgvpidcvgfqshfnsgspynsnfrttlqnfaalgvdvaiteldiq
gassstyaavtndclavsrclgitvwgvrdtdswrsgdtpllfngdgskkaaytavlnal
ngggqikgvgsgrcldvpnasttdgtqvqlydchsatnqqwtytdagelrvygdkcldaa
gtgngtkvqiyscwggdnqkwrlnsdgsivgvqsglcldavgggtangtliqlyscsngs
nqrwtrt