Chains and heterogens:
PDB Chain Sequences:
>2piaA (A:) ttpqedgflrlkiaskekiardiwsfeltdpqgaplppfeaganltvavpngsrrtyslc ndsqernryviavkrdsngrggsisfiddtsegdavevslprnefpldkraksfilvagg igitpmlsmarqlraeglrsfrlyyltrdpegtaffdeltsdewrsdvkihhdhgdptka fdfwsvfekskpaqhvyccgpqalmdtvrdmtghwpsgtvhfesfgatntnarentpftv rlsrsgtsfeipanrsilevlrdanvrvpsscesgtcgscktalcsgeadhrdmvlrdde kgtqimvcvsraksaelvldl