Fig. 5
From: Mitochondrial group I and group II introns in the sponge orders Agelasida and Axinellida
Predicted secondary structure of C. verrucosa intron 966 (Group II). The exon and intron bases are indicated in lower-case and upper-case letters, respectively. The conserved domains (I-VI) follow the standard Group II introns scheme [3, 25, 26]. Amino-acids involved in conserved tertiary base pairing and tetraloops are shaded
