>3an4A (A:) observed residues (from ATOM records)
npesadlralakhlydsyiksfpltkakarailtgkttdkspfviydmnslmmgedkiks
kevairifqgcqfrsveavqeiteyaksipgfvnldlndqvtllkygvheiiytmlaslm
nkdgvlisegqgfmtreflkslrkpfgdfmepkfefavkfnalelddsdlaifiaviils
gdrpgllnvkpiediqdnllqalelqlklnhpessqlfakllqkmtdlrqivtehvqllq
vikktetdmslhpllqeiykdl