Abstract: The present disclosure relates to methods for preparing derivatives of peptides and proteins, including preparing sialylglycosylated peptides and proteins, and to the resulting derivatives of peptides and proteins and their uses. The disclosure further relates to methods of reducing fibrillation of a peptide or protein by preparing derivatives of said peptides or proteins. The disclosure further relates to stable analogues of peptides and proteins, in particular stable insulin and glucagon analogues, which find use in methods of preparing derivatives of said peptides and proteins.

Abstract: Provided herein are biologically active single chain relaxin peptides. In particular the present invention relates to single chain relaxin peptides comprising a B chain derived from relaxin-2, the peptide being truncated by one or more amino acid residues at the N-terminus with respect to the sequence of the B chain of native relaxin-2. Typically the single chain relaxin peptides selectively bind to the RXFP1 receptor.

Abstract: Provided herein are biologically active single chain relaxin peptides. In particular the present invention relates to single chain relaxin peptides comprising a B chain derived from relaxin-2, the peptide being truncated by one or more amino acid residues at the N-terminus with respect to the sequence of the B chain of native relaxin-2. Typically the single chain relaxin peptides selectively bind to the RXFP1 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: Provided herein are modified relaxin polypeptides wherein the B chain comprises the core amino acid sequence CGR-XXX-R-XX-I/V-XX-CG (SEQ ID NO:1), where X is any amino acid. Also provided are modified relaxin polypeptides comprising at least an A and a B chain, wherein the A and B chains are derived from different naturally occurring relaxins and wherein the B chain comprises the core amino acid sequence CGR-XXX-R-XX-I/V-XX-CG (SEQ ID NO:1), where X is any amino acid.

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 relaxin polypeptides comprising a relaxin A chain and a B chain derived from a relaxin superfamily member, wherein the A chain comprises no intra-chain disulphide bonds. In particular embodiments the modified polypeptides comprise relaxin-3 derived A and B chains, and truncations of the A and/or B chains from the N-termini and/or C-termini. In particular embodiments the polypeptides of the invention are selective agonists or antagonists of the RXFP3 receptor.

Abstract: Provided herein are modified relaxin polypeptides wherein the B chain comprises the core amino acid sequence CGR-XXX-R-XX-I/V-XX-CG (SEQ ID NO:1), where X is any amino acid. Also provided are modified relaxin polypeptides comprising at least an A and a B chain, wherein the A and B chains are derived from different naturally occurring relaxins and wherein the B chain comprises the core amino acid sequence CGR-XXX-R-XX-I/V-XX-CG (SEQ ID NO:1), where X is any amino acid.