Chains and heterogens:
PDB Chain Sequences:
>1d4nA (A:) dktvrwcavseheatkcqsfrdhmksvipsdgpsvacvkkasyldciraiaaneadavtl daglvydaylapnnlkpvvaefygskedpqtfyyavavvkkdsgfqmnqlrgkkschtgl grsagwnipigllycdlpeprkplekavanffsgscapcadgtdfpqlcqlcpgcgcstl nqyfgysgafkclkdgagdvafvkestifenlankadrdqyellcldntrkpvdeykdch laqvpshtvvarsmggkedliwellnqaqehfgkdkskefqlfssphgkdllfkdsahgf lkvpprmdakmylgyeyvtairnlregtc