The overall set of experiments consist of sampling a culture of the unicellular algae Ostreococcus tauri (wild type) every 24 hours for 4 time points(ZT24, ZT48, ZT72 and ZT96). Each time point was performed with 5 replicate culture flasks, the cultures were grown under dark conditions. This proteome is associated to the transition from an 12:12 light:dark to a dark:dark regime.