Chains and heterogens:
PDB Chain Sequences:
>1ytn_ (-) mrerphtsghhgagearatapstvspygpearaelssrlttlrntlapatndprylqacg geklnrfrdiqcrrqtavradlnanyiqvgntrtiacqyplqsqleshfrmlaenrtpvl avlassseianqrfgmpdyfrqsgtygsitveskmtqqvglgdgimadmytltireagqk tisvpvvhvgnwpdqtavssevtkalaslvdqtaetkrnmyeskgssavaddsklrpvih cragvgrtaqligamcmndsrnsqlsvedmvsqmrvqrngimvqkdeqldvliklaegqg rpllns
>1ytn_ (-) vspygpearaelssrlttlrntlapatndprylqacggeklnrfrdiqcrrqtavradln anyiqvgntrtiacqyplqsqleshfrmlaenrtpvlavlassseianqrfgmpdyfrqs gtygsitveskmtqqvglgdgimadmytltireagqktisvpvvhvgnwpdqtavssevt kalaslvdqtaetkrnmyeskgssavaddsklrpvihcragvgrtaqligamcmndsrns qlsvedmvsqmrvqrngimvqkdeqldvliklaegqgrpllns