Figure 2.

Comparison of the Leptosira RNA polymerase β' subunit with its homologues in other chlorophytes and the streptophytes Mesostigma and maize. The sequences of the rpoB gene products were aligned using the fused rpoBa and rpoBb gene products of Leptosira, Stigeoclonium, Scenedesmus and Chlamydomonas. The regions showing significant sequence conservation are denoted by grey boxes, with the numbers inside these boxes referring to amino acids. The numbers of amino acids in the variable regions are also indicated. The lower portion of the figure shows the alignment for the region corresponding to the junction between the rpoBa and rpoBb gene products. The segment showing significant sequence similarity within this region is represented by the grey box. The C-terminal residues of RpoBa are in bold characters and the N-terminal residues of RpoBb are in italics.