Partial genetic maps of the 7 Chlamydomonas reinhardtii nuclear-encoded genes employed in the analysis. The bracketed segment beneath each map represents the region that was PCR amplified. Left of each map is the name of the gene, the approximate size of the region that was PCR amplified, and the location of the gene within the C. reinhardtii nuclear genome – locations are based on the C. reinhardtii draft nuclear genome sequence version 3.0 . Exons are red; they are labelled with an "E" and a number denoting their position within the gene. Introns are blue and are labelled with a roman numeral denoting their location within the gene. Note: each of these genes is present only once in the C. reinhardtii nuclear genome.