>3k4pA (A:) observed residues (from ATOM records)
scdtvdqgyqcfsetshlwgqyapffslanesvispevpagcrvtfaqvlsrhgaryptd
skgkkysalieeiqqnattfdgkyaflktynyslgaddltpfgeqelvnsgikfyqryes
ltrnivpfirssgssrviasgkkfiegfqstklkdpraqpgqsspkidvviseasssnnt
ldpgtctvfedseladtveanftatfvpsirqrlendlsgvtltdtevtylmdmcsfdti
ststvdtklspfcdlfthdewinydylqslkkyyghgagnplgptqgvgyaneliarlth
spvhddtssnhtldsspatfplnstlyadfshdngiisilfalglyngtkplstttveni
tqtdgfssawtvpfasrlyvemmqcqaeqeplvrvlvndrvvplhgcpvdalgrctrdsf
vrglsfarsggdwaecfa