abstract |
The present invention is concerned with peptides binding to the prolactin receptor, wherein said peptides have an improved binding via binding site 1 (BS1) to the prolactin receptor, particularly variants of human prolactin comprising one or more amino acid mutations in the positions corresponding to positions 21, 36, 38, 42, 93, 97, 130, 135, 157 and 166 of human prolactin. |