Chains and heterogens:
PDB Chain Sequences:
>1sat_ (-) tgydavddllhyhergngiqingkdsfsneqaglfitrenqtwngykvfgqpvkltfsfp dykfsstnvagdtglskfsaeqqqqaklslqswadvanitftevaagqkanitfgnysqd rpghydygtqayaflpntiwqgqdlggqtwynvnqsnvkhpatedygrqtftheighalg lshpgdynagegdptyadvtyaedtrqfslmsywsetntggdngghyaaapllddiaaiq hlyganlstrtgdtvygfnsntgrdflsttsnsqkvifaawdaggndtfdfsgytanqri nlneksfsdvgglkgnvsiaagvtienaiggsgndvivgnaannvlkggagndvlfgggg adelwggagkdifvfsaasdsapgasdwirdfqkgidkidlsffdkeansssfihfvdhf sgtageallsynassnvtdlsvnigghaapdflvkivgqvdvatdfiv