>1a21A (A:) SEQRES residues adttgraynltwkstnfktilewepksidhvytvqistrlenwkskcfltaetecdltde vvkdvgqtymarvlsyparngnttgfpeeppfrnspeftpyldtnlgqptiqsfeqvgtk lnvtvqdartlvrrngtflslravfgkdlnytlyywrasstgkktattntneflidvdkg enycfsvqavipsrkrkqrspesltectsreqgraremf