In this second special issue on signal transduction
leading specialists in their fields again present overviews
of topics related to the highly topicalsubject of signal
transduction. The first contribution, by Keppler, deals with
the biosynthesis, transport, inactivation, and analysis of
leukotrienes. Mohr et al. present an excellent overview of
the biology of the peptide hormone oxytocin and its role in
signal transduction.The review by Holzer describes the
significance of peptinergic sensory neurons in the control
of vascular functions. In the contribution by Wolf etal
the molecular biology of the Y chromosome is discussed.