Chains and heterogens:
PDB Chain Sequences:
>1ua7A (A:) psiksgtilhawnwsfntlkhnmkdihdagytaiqtspinqvkegnqgdksmsnwywlyq ptsyqignrylgteqefkemcaaaeeygikvivdavinhttfdyaaisnevksipnwthg ntqiknwsdrwdvtqnsllglydwntqntqvqsylkrfleralndgadgfrfdaakhiel pddgsygsqfwpnitntsaefqygeilqdsasrdaayanymdvtasnyghsirsalknrn lgvsnishyasdvsadklvtwveshdtyanddeestwmsdddirlgwaviasrsgstplf fsrpegggngvrfpgksqigdrgsalfedqaitavnrfhnvmagqpeelsnpqgnnqifm nqrgshgvvlanagsssvsintatklpdgrydnkagagsfqvndgkltgtinarsvavly pd