Intron pattern in Syt coding regions. This figure shows an overview of the structures of Syt genes. Intron positions relative to TM, C2A and C2B domains, and their phases are indicated. Phase 0 introns are indicated by black dots. Phase 1 introns are indicated by red dots. Phase 2 introns are indicated by blue dots. Question marks indicate unknown regions where the genomic sequence is incomplete. The positions of additional alternative exons [11,4] are indicated by asterisks. Groups of likely orthologues are indicated in shades of blue. Groups of likely paralogues are indicated in shades of red.