Chains and heterogens:
PDB Chain Sequences:
>1tux_ (-) aaaqsvdqlidargkvyfgvatdqnrlttgknaaiiqadfgqvtpensmkwdatepsqgn fnfagadylvnwaqqngklirghtlvwhsqlpswvvsitdkntltnvmknhittimtryi gkirawdvvneafnedgslrqtvfnnvigedyipiafrtaraadpnaklyindynldsas kpktsaivkrvkkwraagvpidgigsqthlsagqgasidaalpnlasagtpevaiteldi agatstdyvdvvnacldvdscigitvwgvadpdswrasttpllfdgnfnpkpaynaivql l