Fig. 2From: Chloroplast phylogenomic analysis of chlorophyte green algae identifies a novel lineage sister to the Sphaeropleales (Chlorophyceae)GC/AT-skew plots of the PCG12RNA (a) and PCG123RNA (b) nucleotide data sets. The nucleotide skew values were calculated using DAMBE [35]; each point corresponds to one of the 33 chlorophycean taxa included in the data setsBack to article page