Abstract: The present invention relates to biologically active single chain relaxin polypeptides comprising a relaxin B chain derived from relaxin-3, the polypeptides being truncated by one or more amino acids at the C-terminus of the relaxin-3 B chain. Typically the single chain relaxin polypeptides are antagonists of the RXFP3 receptor, and in some embodiments are selective antagonists of the RXFP3 receptor.

Abstract: The present invention relates to biologically active single chain relaxin polypeptides comprising a relaxin B chain derived from relaxin-3, the polypeptides being truncated by one or more amino acids at the C-terminus of the relaxin-3 B chain. Typically the single chain relaxin polypeptides are antagonists of the RXFP3 receptor, and in some embodiments are selective antagonists of the RXFP3 receptor.

Abstract: Disclosed is a method for identifying compounds that bind to or modulate a glutamate transporter. The disclosed method is useful for identifying compounds that can inhibit, stimulate, or modulate the activity of the glutamate transporter and thus affect glutamate reuptake. The method is a screening technique where compounds known to bind to glutamate receptors (for example, glutamate receptor ligands, including many agonists, and antagonists) are bound to a glutamate transporter and compounds are screened to identify those that can alter the binding of the glutamate receptor-binding compounds. Compounds shown to alter the binding of the receptor compounds from glutamate transporters in the disclosed assay can have a variety of effects on glutamate transporter activity including activation or inhibition. These compounds are expected to affect or interfere with glutamate reuptake by the glutamate transporter and thus can be used to modulate, stimulate, or inhibit glutamate reuptake.