Fig. 5.—

Plastid-genome alignments for three representative diatoms. One copy of the inverted repeat region was removed from each genome prior to aligning the genomes. Colored blocks indicate gene clusters with conserved gene order across the three taxa. Blocks below black center line are inverted relative to the Leptocylindrus reference genome. Two blocks (a and b) contain the largest conserved gene clusters, consisting of the RNA polymerase genes (a) or the large ribosomal operon in the small single copy region (b).