A comparison of the initial and updated versions of the Anopheles gambiae genome assembly.(a) The scaffolds from the previous and updated versions of the genome are shown by gray and pink bars, respectively. Purple stripes on the scaffolds indicate alternative haplotype scaffolds with sizes bigger than 50 kbp. Black bars correspond to the BAC clones that cross inter-scaffold gaps. (b) The updated status of the A. gambiae genome project. Sectors correspond to the previously mapped scaffolds, additionally physically mapped scaffolds, alternative haplotype scaffolds, Y-specific scaffolds, bacterial contaminant scaffolds and the remaining scaffolds that are not assigned to the chromosomes.