Chains and heterogens:
PDB Chain Sequences:
>1srp_ (-) tgydavddllhyhergngiqingkdsfsneqaglfitrenqtwngykvfgqpvkltfsfp dykfsstnvagdtglskfsaeqqqqaklslqswadvanitftevaagqkanitfgnysqd rpghydygtqayaflpntiwqgqdlggqtwynvnqsnvkhpatedygrqtftheighalg lshpgdynagegnptyrdvtyaedtrqfslmsywsetntggdngghyaaapllddiaaiq hlyganlstrtgdtvygfnsntgrdflsttsnsqkvifaawdaggndtfdfsgytanqri nlneksfsdvgglkgnvsiaagvtienaiggsgndvivgnaannvlkggagndvlfgggg adelwggagkdifvfsaasdsapgasdwirdfqkgidkidlsffnkeaqssdfihfvdhf sgaageallsynasnnvtdlsvnigghqapdflvkivgqvdvatdfiv