Chlorides/chemistry; Helminth Proteins/chemistry; Ion Channels/chemistry; Receptors, Glutamate/chemistry; Rotifera/chemistry; Amino Acid Sequence; Amino Acids/chemistry; Amino Acids/metabolism; Animals; Binding Sites; Chlorides/metabolism; Crystallography, X-Ray; Escherichia coli/genetics; Evolution, Molecular; Helminth Proteins/classification; Helminth Proteins/genetics; Ion Channels/classification; Ion Channels/genetics; Kinetics; Ligands; Molecular Dynamics Simulation; Molecular Sequence Data; Phylogeny; Protein Binding; Protein Structure, Secondary; Protein Structure, Tertiary; Receptors, Glutamate/classification; Receptors, Glutamate/genetics; Recombinant Proteins/chemistry; Recombinant Proteins/classification; Recombinant Proteins/genetics; Sequence Alignment