Chains and heterogens:
PDB Chain Sequences:
>1atg_ (-) elkvvtatnflgtleqlagqfakqtghavvissgssgpvyaqivngapynvffsadeksp ekldnqgfalpgsrftyaigklvlwsakpglvdnqgkvlagngwrhiaisnpqiapygla gtqvlthlglldkltaqeriveansvgqahsqtasgaadlgfvalaqiiqaaakipgshw fppanyyepivqqavitkstaekanaeqfmswmkgpkavaiikaagyvlpq