>4ns1A (A:) observed residues (from ATOM records)
mklqeqhyheaasflssrlpgdaktaiilgsglgelaekienktvipyneiphfaqakgn
iiggilggtpvvamqgrfhyyegysmdqvtfpirvmkllgienlfvsnaaggintsfkvg
dlmiicdhinnlpnpligpnmdmfgvrfpdmtraydrefiakakgiaqelnipvkegvyv
gltgpsyetpaeykfwgqvggdaigmstvpevivarhtgirvfgmsvitnegyhfaddfv
ndeqdviraanaasekmgaifarliaav