BMC Genomics 2008, 9:627 http://www.biomedcentral.com/1471-2164/9/627 aFDniyganeuarrmoebic1iossoisf ginentheeinpdruecsteinocneaonfdarnetpimreyscsiinonAi(nCr)esponse to anaerobiosis (A), antimycin A treatment in air (B) and subsequent Dynamics of gene induction and repression in response to anaerobiosis (A), antimycin A treatment in air (B) and subsequent anaerobiosis in the presence of antimycin A (C). The number of genes that responded significantly (P ≤ 0.01) at each time point is shown. Genes are divided into those that were up-regulated from those that were down-regu- lated. Black bars indicate genes that significantly responded for the first time at the indicated time point whereas gray bars indi- cate genes that had already been identified at an earlier time point yet continued to be differentially expressed as compared to the control. The combined height of the black and gray bars is the total number of genes at each time point that were differen- tially expressed as compared to the aerobic control. Page 4 of 14 (page number not for citation purposes)