Fig. 6From: Mitochondrial group I and group II introns in the sponge orders Agelasida and AxinellidaPredicted secondary structure of C. verrucosa intron 1141 (Group II). The exon and intron bases are indicated in lower-case and in 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 shadedBack to article page