Figure 9.

Comparative illustration of genetic organization of nif operon in heterocyst-forming cyanobacteria. The gene organizations of nif operons in heterocyst-forming cyanobacteria are demonstrated in colour as nifH in purple, nifD in green, nifK in yellow and others in blue. Each excision element was indicated by a site-specific recombinase labelled in red and three dots that represent the remaining part of the element. The lengths of the excision elements are shown above

Wang et al. BMC Genomics 2012 13:613   doi:10.1186/1471-2164-13-613
Download authors' original image