Biology of the NPY family of peptides, their receptors and processing enzymes -- Evolutionary perspective on the NPY-PYY-PP peptides and their receptors -- Function, distribution and molecular pharmacology of NPY-family receptors -- NPY processing in neuronal and non-neuronal tissues by proconvertases -- Dipeptidyl-peptidase IV and aminopeptidase P: molecular switches of NPY/PYY receptor affini…