Nature Methods, "Single-cell analysis", April 2011, volume 8, number 4s. Supplement to Nature Publishing Group journals. "Three reviews and a commentary describe methods for reading genomes and for measuring transcript, peptide and metabolite levels in a single cell. Two perspective manuscripts describe methods for the study of single stem cells." N. de Souza, Supplement Editor. Read the supplement at http://www.nature.com/nmeth/journal/v8/n4s/index.html.