>1tw3A (A:) observed residues (from ATOM records)
qidalrtlirlgslhtpmvvrtaatlrlvdhilagartvkalaartdtrpeallrlirhl
vaiglleedapgefvptevgelladdhpaaqrawhdltqavaradisftrlpdairtgrp
tyesiygkpfyedlagrpdlrasfdsllacdqdvafdapaaaydwtnvrhvldvgggkgg
faaaiarraphvsatvlemagtvdtarsylkdeglsdrvdvvegdffeplprkadaiils
fvllnwpdhdavriltrcaealepggriliherddlhensfneqfteldlrmlvflggal
rtrekwdglaasaglvveevrqlpsptipydlsllvlapa