Supplement 

microRNAs

microRNAs are a considerable part of the transcriptional output of the genomes of plants and animals, they regulate a large part of their transcriptomes, and they serve important regulatory functions in widespread biological activities. Thus they must be accounted for if we are to understand the complexity of gene expression and the regulatory potential of the genome. This supplement to Nature Geneticscovers the latest advances in the genomic analysis of microRNA function.

Editorial

Perspectives

Review