>3is3A (A:) observed residues (from ATOM records)
yipgrldgkvalvtgsgrgigaavavhlgrlgakvvvnyanstkdaekvvseikalgsda
iaikadirqvpeivklfdqavahfghldiavsnsgvvsfghlkdvteeefdrvfslntrg
qffvareayrhlteggrivltssntskdfsvpkhslysgskgavdsfvrifskdcgdkki
tvnavapggtvtdmfhevshhyipngtsytaeqrqqmaahasplhrngwpqdvanvvgfl
vskegewvngkvltldggaa