>2b4tR (R:) observed residues (from ATOM records)
tklgingfgrigrlvfraafgrkdievvaindpfmdlnhlcyllkydsvhgqfpcevtha
dgflligekkvsvfaekdpsqipwgkcqvdvvcestgvfltkelasshlkggakkvimsa
ppkddtpiyvmginhhqydtkqlivsnascttnclaplakvindrfgiveglmttvhast
anqlvvdgpskggkdwragrcalsniipastgaakavgkvlpelngkltgvafrvpigtv
svvdlvcrlqkpakyeevaleikkaaegplkgilgytedevvsqdfvhdnrssifdmkag
lalndnffklvswydnewgysnrvldlavhitt