Chains and heterogens:
PDB Chain Sequences:
>1fts_ (-) rsllktkenlgsgfislfrgkkidddlfeeleeqlliadvgvettrkiitnltegasrkq lrdaealygllkeemgeilakvdeplnvegkapfvilmvgvngvgktttigklarqfeqq gksvmlaagdtfraaaveqlqvwgqrnnipviaqhtgadsasvifdaiqaakarnidvli adtagrlqnkshlmeelkkivrvmkkldveaphevmltidastgqnavsqaklfheavgl tgitltkldgtakggvifsvadqfgipiryigvgeriedlrpfkaddfiealfar