>1r4nB (B:) observed residues (from ATOM records)
dwegrwnhvkkflersgpfthpdfepsteslqflldtckvlvigagglgcellknlalsg
frqihvidmdtidvsnlnrqflfrpkdigrpkaevaaeflndrvpncnvvphfnkiqdfn
dtfyrqfhiivcgldsiiarrwingmlisllnyedgvldpssivplidggtegfkgnarv
ilpgmtaciectlelyppqvnfpmatiasmprlpehcieyvrmlqwpkeqpfgegvpldg
ddpehiqwifqkslerasqynirgvtyrltqgvvkriipavastnaviaavcatevfkia
tsayiplnnylvfndvdglytytfeaerkencpacsqlpqniqfspsaklqevldyltns
aslqmkspaitatnrtlylqsvtsieertrkelglvdgqeavadvttpqtvlfklhft