Vision: The retina's fancy tricks p.387
doi: 10.1038/423387a
Volume 423 Issue 6938
News & Views
Astronomy: New direction for γ-rays p.388
doi: 10.1038/423388a
RNA interference: Cereal adultery p.390
doi: 10.1038/423390b
Gene expression: Silent clones speak up p.390
doi: 10.1038/423390a
Condensed-matter physics: Thermopower to the people p.391
doi: 10.1038/423391a
Alzheimer's disease: Mental plaque removal p.392
doi: 10.1038/423392a
Synthetic chemistry: A perfect fit p.394
doi: 10.1038/423394a
Articles
Segregation of object and background motion in the retina p.401
doi: 10.1038/nature01652
A role for Wnt signalling in self-renewal of haematopoietic stem cells p.409
doi: 10.1038/nature01593
Letters
Polarization of the prompt -ray emission from the -ray burst of 6 December 2002 p.415
doi: 10.1038/nature01612
Experimental entanglement purification of arbitrary unknown states p.417
doi: 10.1038/nature01623
Real-time detection of electron tunnelling in a quantum dot p.422
doi: 10.1038/nature01642
Spin entropy as the likely source of enhanced thermopower in NaxCo2O4 p.425
doi: 10.1038/nature01639
146Sm?142Nd evidence from Isua metamorphosed sediments for early differentiation of the Earth's mantle p.428
doi: 10.1038/nature01668
Spontaneous emergence of leaders and followers in foraging pairs p.432
doi: 10.1038/nature01630
GSK-3 regulates production of Alzheimer's disease amyloid- peptides p.435
doi: 10.1038/nature01640
Caenorhabditis elegans early embryogenesis and vulval morphogenesis require chondroitin biosynthesis p.439
doi: 10.1038/nature01634
Chondroitin proteoglycans are involved in cell division of Caenorhabditis elegans p.443
doi: 10.1038/nature01635
Wnt proteins are lipid-modified and can act as stem cell growth factors p.448
doi: 10.1038/nature01611
Deficiency of the adaptor SLP-65 in pre-B-cell acute lymphoblastic leukaemia p.452
doi: 10.1038/nature01608
Humanin peptide suppresses apoptosis by interfering with Bax activation p.456
doi: 10.1038/nature01627
