>2j21A (A:) observed residues (from ATOM records)
svpsqktyqgsygfrlgflhsvtctyspalnklfcqlaktcpvqlwvdstpppgtrvram
aiykqsqhmtevvrrcphhercsdsdglappqhlirvegnlraeylddrntfrhsvvvpy
eppevgsdcttihynymcysscmggmnrrpiltiitledssgnllgrdsfevrvcacpgr
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