>3nf4A (A:) observed residues (from ATOM records)
mavdrllpsqeaaelieltreiadkvldpivdrhekdetypegvfeqlgaagllslpqpe
ewggggqpyevylqvleeiaarwasvavavsvhslsshpllvfgteeqkkrwlpgmlsge
qigayslsepqagsdaaalrcaatptdggyvingskswithggkadfytlfartgsrgvs
cflvpadqpglsfgkpeekmglhavpttsafydnaridadrrigeegqglqiafsaldsg
rlgiaavatglaqaaldeavayanekiidhglgflladmaaavataratyldaarrrdqg
rpysqqasiakltatdaamkvttdavqvfggvgytrdyrverymreakimqifegtnqiq
rlviarglt