Figure 1.

βCA2 has one mRNA form, while βCA4 has two mRNA forms. RNAseq reads were aligned to the βCA2 and βCA4 gene models in the Arabidopsis reference genome. A, Leaf and root RNA samples yielded one form of βCA2 mRNA consisting of nine exons, excluding the first exon of the βCA2 reference gene from TAIR. B, Leaf and root RNA samples yielded two forms of βCA4 mRNA. The long mRNA form is found primarily in the leaf and contains 10 exons, where the first two exons are unique to the long form. The short mRNA form has nine exons, where the first exon is unique to the short mRNA form and can be found in both the root and shoot RNA samples.