>1xyfB (B:) SEQRES residues
aestlgaaaaqsgryfgtaiasgklgdsayttiasrefnmvtaenemkidatepqrgqfn
fsagdrvynwavqngkqvrghtlawhsqqpgwmqslsgstlrqamidhingvmghykgki
aqwdvvneafsddgsggrrdsnlqrtgndwievafrtaraadpaaklcyndynienwtwa
ktqgvynmvrdfkqrgvpidcvgfqshfnsgspynsnfrttlqnfaalgvdvaiteldiq
gassstyaavtndclavsrclgitvwgvrdtdswrsgdtpllfngdgskkaaytavlnal
nggsstpppsgggqikgvgsgrcldvpnasttdgtqvqlydchsatnqqwtytdagelrv
ygdkcldaagtgngtkvqiyscwggdnqkwrlnsdgsivgvqsglcldavgggtangtli
qlyscsngsnqrwtrt