The Wnt-pathway is a key-signalling pathway in metazoans. The beta-catenins, which include bar-1, have a function in gene expression regulation in Wnt-signalling. In this study, the effect of a loss-of-function mutation (bar-1(ga80) in the strain EW15) on gene-expression was tested. To this end age-synchronized populations of both N2 (wild-type) and EW15 were grown for 48 hours at 20 degrees Celsius, after which populations were collected and total RNA was isolated. For each genotype six replicates were collected in three batches of two replicates.