Chains and heterogens:
PDB Chain Sequences:
>4yasA (A:) afahfvlihtichgawiwhklkpllealghkvtaldlaasgvdprqieeigsfdeysepl ltflealppgekvilvgescgglniaiaadkycekiaaavfhnsvlpdtehcpsyvvdkl mevfpdwkdttyftytkdgkeitglklgftllrenlytlcgpeeyelakmltrkgslfqn ilakrpfftkegygsikkiyvwtdqdeiflpefqlwqienykpdkvykveggdhklqltk tkeiaeilqevadtyn