Glp-1 and the invention relates to exendin

The present invention, GLP-1 and a peptide derived from (glucagon-like peptide-1) and exendin-3 and (or) exendin-4, bind to the GLP-1 receptor, GLP-1 receptor expression is the production of means for the diagnosis and treatment of benign and malignant diseases involving labeled or without labeling, relates to a peptide that can be used.