Chains and heterogens:
PDB Chain Sequences:
>1xyfA (A:) aestlgaaaaqsgryfgtaiasgklgdsayttiasrefnmvtaenemkidatepqrgqfn fsagdrvynwavqngkqvrghtlawhsqqpgwmqslsgstlrqamidhingvmghykgki aqwdvvneafsddgsggrrdsnlqrtgndwievafrtaraadpaaklcyndynienwtwa ktqgvynmvrdfkqrgvpidcvgfqshfnsgspynsnfrttlqnfaalgvdvaiteldiq gassstyaavtndclavsrclgitvwgvrdtdswrsgdtpllfngdgskkaaytavlnal nggsstpppsgggqikgvgsgrcldvpnasttdgtqvqlydchsatnqqwtytdagelrv ygdkcldaagtgngtkvqiyscwggdnqkwrlnsdgsivgvqsglcldavgggtangtli qlyscsngsnqrwtrt
>1xyfA (A:) aestlgaaaaqsgryfgtaiasgklgdsayttiasrefnmvtaenemkidatepqrgqfn fsagdrvynwavqngkqvrghtlawhsqqpgwmqslsgstlrqamidhingvmghykgki aqwdvvneafsddgsggrrdsnlqrtgndwievafrtaraadpaaklcyndynienwtwa ktqgvynmvrdfkqrgvpidcvgfqshfnsgspynsnfrttlqnfaalgvdvaiteldiq gassstyaavtndclavsrclgitvwgvrdtdswrsgdtpllfngdgskkaaytavlnal ngggqikgvgsgrcldvpnasttdgtqvqlydchsatnqqwtytdagelrvygdkcldaa gtgngtkvqiyscwggdnqkwrlnsdgsivgvqsglcldavgggtangtliqlyscsngs nqrwtrt
>1xyfB (B:) aestlgaaaaqsgryfgtaiasgklgdsayttiasrefnmvtaenemkidatepqrgqfn fsagdrvynwavqngkqvrghtlawhsqqpgwmqslsgstlrqamidhingvmghykgki aqwdvvneafsddgsggrrdsnlqrtgndwievafrtaraadpaaklcyndynienwtwa ktqgvynmvrdfkqrgvpidcvgfqshfnsgspynsnfrttlqnfaalgvdvaiteldiq gassstyaavtndclavsrclgitvwgvrdtdswrsgdtpllfngdgskkaaytavlnal nggsstpppsgggqikgvgsgrcldvpnasttdgtqvqlydchsatnqqwtytdagelrv ygdkcldaagtgngtkvqiyscwggdnqkwrlnsdgsivgvqsglcldavgggtangtli qlyscsngsnqrwtrt
>1xyfB (B:) aestlgaaaaqsgryfgtaiasgklgdsayttiasrefnmvtaenemkidatepqrgqfn fsagdrvynwavqngkqvrghtlawhsqqpgwmqslsgstlrqamidhingvmghykgki aqwdvvneafsddgsggrrdsnlqrtgndwievafrtaraadpaaklcyndynienwtwa ktqgvynmvrdfkqrgvpidcvgfqshfnsgspynsnfrttlqnfaalgvdvaiteldiq gassstyaavtndclavsrclgitvwgvrdtdswrsgdtpllfngdgskkaaytavlnal ngggqikgvgsgrcldvpnasttdgtqvqlydchsatnqqwtytdagelrvygdkcldaa gtgngtkvqiyscwggdnqkwrlnsdgsivgvqsglcldavgggtangtliqlyscsngs nqrwtrt