R on the genetic basis of mental disorders crossed a major watershed this summer. For the first time, specific genes have been discovered that influence susceptibility to schizophrenia, a psychosis that affects nearly 1% of people throughout the world and accounts for about 2.5% of health-care costs (1). In this issue of PNAS, Chumakov and colleagues (2) describe a new human gene, G72, on chrom...

s 1/18/16 A. Development of the Nervous System Class-6 Semaphorins have receptor function during neural circuit formation A6 Authors Vlad Karas (1), Irwin Andermatt (1), Olivier Mauti (1), Esther Stoeckli (1) Affiliations 1) University of Zurich Class-6 Semaphorins form a transmembrane subgroup of the Semaphorin family. They were implicated in various processes, such as differentiation, cell mi...