Figure 3.

Alternatively spliced exons in the Ca_V2 genes. The locations of constitutive exons (black) and conserved alternative exons (colored) in mouse Cacna1a, Cacna1b and Cacna1e genes. Gene diagrams are adapted from the UCSC genome browser (Feb. 2006 mouse assembly). Alternative exons 37a and 37b are found in all three Ca_V2 channel genes. An alternative exon e18a is present in Cacna1b and Cacna1e, but a homologous exon has not been identified in Cacna1a. Alternative exons e24a and e31a are conserved in Cacna1a and Cacna1b, but equivalent exons have not been identified in Cacna1e.