High-affinity analogues of neuropeptide Y containing conformationally restricted non-proteinogenic amino acids.

High-afnnity analogues of neuropeptide Y containing conformationally restricted non-proteinogenic amino acids Annette G. Beck-Sickinger*t, Eike Hoffmann*, Klaus Padinit, Hans-Ulrich Reissigt, Klaus-Dieter WillimQ, Heike A. WielandQ and Gunther Jung* *Institute of Organic Chemistry, University of Tubingen, Auf der Morgenstelle 18, D-72076 Tubingen, Germany, $Institute of Organic Chemistry, Technische Universitat Darmstadt, Petersenstr. 22, D-64287 Darmstadt, Germany and SPreclinical Research, Dr. Karl Thomae GmbH, D-88397 Biberach, Germany I 45