>1yztB (B:) observed residues (from ATOM records)
aysfkvvllgegcvgktslvlrycenkfndkhittlqasfltkklniggkrvnlaiwdta
rdsngailvyditdedsfqkvknwvkelrkmlgneiclcivgnkidlekerhvsiqeaes
yaesvgakhyhtsakqnkgieelfldlckrmiet