>1a21A (A:) SEQRES residues tgraynltwkstnfktilewepksidhvytvqistrlenwkskcfltaetecdltdevvk dvgqtymarvlsyparngnttgfpeeppfrnspeftpyldtnlgqptiqsfeqvgtklnv tvqdartlvrrngtflslravfgkdlnytlyywrasstgkktattntneflidvdkgeny cfsvqavipsrkrkqrspesltect