Chains and heterogens:
PDB Chain Sequences:
>1qx0A (A:) mlshmvltrqdigraasyyedgaddyyakdgdasewqgkgaeelglsgevdskrfrella gnigeghrimrsatrqdskerigldltfsapksvslqalvagdaeiikahdravartleq aearaqarqkiqgktriettgnlvigkfrhetsrerdpqlhthavilnmtkrsdgqwral kndeivkatrylgavynaelahelqklgyqlrygkdgnfdlahidrqqiegfskrteqia ewyaargldpnsvsleqkqaakvlsrakktsvdrealraewqatakelgidfs
>1qx0A (A:) mlshmvltrqdigraasyyedgaddyydasewqgkgaeelglsgevdskrfrellagnig eghrimrsatrqdskerigldltfsapksvslqalvagdaeiikahdravartleqaear aqarqkiqgktriettgnlvigkfrhetsrerdpqlhthavilnmtkrsdgqwralknde ivkatrylgavynaelahelqklgyqlrygkdgnfdlahidrqqiegfskrteqiaewya argldpnsvsleqkqaakvlsrakktsvdrealraewqatakelgidfs