%0 Journal Article %T Nature-Derived Peptides: A Growing Niche for GPCR Ligand Discovery %J - %D 2019 %R https://doi.org/10.1016/j.tips.2019.03.004 %X Natural products have been and continue to be an important source of GPCRs ligands %U https://www.cell.com/trends/pharmacological-sciences/fulltext/S0165-6147(19)30046-X