>3szzA (A:) observed residues (from ATOM records)
mskisvtvngrrypwprvpaiavcldgcepayldaaidaglmpalkrikergavrlahsv
ipsftnpnnlsiatgsppavhgicgnylyepstgeevmmndpkflraptifqafydagar
vavvtakdklrallgkglrfdegravcfsseksdkatraehgidnasawlgrpvpevysa
alsefvfaagvkllrefrpdimyltttdyvqhkyapgvpeansfyemfdrylaeldglga
aivvtadhgmkpkhkadgspdviyvqdlldewlgkdaarvilpitdpyvvhhgalgsfat
aylpdgcdrseimarlkaiqgvdvvlgreeacrrfelpedrigdivlvssenktlgtseh
rhdlaaldeplrshgglteqevpfivnrvlpelpnaprlrnfdaffyavtaaa