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Fig. 6 | BMC Evolutionary Biology

Fig. 6

From: Evolution of group I introns in Porifera: new evidence for intron mobility and implications for DNA barcoding

Fig. 6

Predicted secondary structures of Microscleroderma sp. 2 (a), Setidium sp. 1 (b), Scleritoderma sp. 2 (c) (group I, IB, intron 723), Microscleroderma herdmani 3 (d) and Tetilla quirimure (e) (group I, IB, intron 870). Exon bases are in lower-case letters and intron bases in upper-case letters. Paired P1-P10 helices and their conserved sequences (P, Q, R, S) are labeled according to the standard group I intron scheme [88]. The HEGs are present in the loops of their respective P8 helix. For a better comparison the same color scheme as in Szitenberg et al. [82] was used to highlight differences in the P2, P6 and P9 regions. Potential start and stop codons are highlighted in light gray

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