Chains and heterogens:
PDB Chain Sequences:
>1er8E (E:) stgsatttpidslddayitpvqigtpaqtlnldfdtgssdlwvfssettasevdgqtiyt psksttakllsgatwsisygdgssssgdvytdtvsvggltvtgqavesakkvsssfteds tidgllglafstlntvsptqqktffdnakasldspvftadlgyhapgtynfgfidttayt gsitytavstkqgfwewtstgyavgsgtfkstsidgiadtgttllylpatvvsaywaqvs gakssssvggyvfpcsatlpsftfgvgsarivipgdyidfgpistgssscfggiqssagi ginifgdvalkaafvvfngattptlgfask