C07K 5/0227

Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing at least one abnormal peptide link {containing the (partial) peptide sequence -Phe-His-NH-(X)2-C(=0)-, e.g. Renin-inhibitors with n = 2 - 6; for n > 6 see [CPC: C07K5/06] - [CPC: C07K5/10]}