Chains and heterogens:
PDB Chain Sequences:
>3pcwA (A:) stgsatttpidslddayitpvqigtpaqtlnldfdtgssdlwvfssettasevdgqtiyt psksttakllsgatwsisygdgssssgdvytdtvsvggltvtgqavesakkvsssfteds tidgllglafstlntvsptqqktffdnakasldspvftadlgyhapgtynfgfidttayt gsitytavstkqgfwewtstgyavgsgtfkstsidgiadtgttllylpatvvsaywaqvs gakssssvggyvfpcsatlpsftfgvgsarivipgdyidfgpistgssscfggiqssagi ginifgdvalkaafvvfngattptlgfask