06 December 2013
Vol 342, Issue 6163

About The Cover

Cover image expansion

COVER Variation among three individual mouse embryonic fibroblasts in a micrograph in which individual messenger RNA transcripts from three genes fluoresce with different colored markers (cell diameter: ~12.5 micrometers). Such techniques that allow measurements in single cells provide new insights into biological control mechanisms and are the subject of a special section starting on page 1187. Image: Dina Faddah and Rudolf Jaenisch, Whitehead Institute for Biomedical Research