a probabilistic functional gene network for baker's yeast, Saccharomyces cerevisiae, which has been a major model organism for eukaryotic genetics and cell biology. Information from yeast biology has shed light on genetic of human diseases including cancer as well as core eukaryotic cellular processes such as transcription and translation. Huge amount of data derived from wide variety of experimental and computational studies have been infiltrated into the YeastNet. Therefore, this single gene network provides an integrated and comprehensive information platform to facilitate various biological studies. The current version of YeastNet (v3) maps 362,512 functional couplings among 5,818 coding genes (covers ~99% of all yeast coding genes) and a total number of links from all data-specific networks is about 2 millions. Edge information for all data-specific networks as well as the integrated network is available from Download page. Previous version of YeastNet(v2) is located here.