Skip to main content
Figure 2 | BMC Research Notes

Figure 2

From: Diversity, mobility, and structural and functional evolution of group II introns carrying an unusual 3' extension

Figure 2

A) Multiple alignment of B.th .I6 and B.c .I16 homing sites in pXO1-42 sequences. The sequences shown span positions -25 to +15 around the intron insertion site (indicated by square brackets). Sequences numbered 1-4 correspond to the four groups shown in Figure 1A. Strains with different sequences not belonging to these groups (shown in black in Figure 1A) are individually listed by name (strain F65185 is not included due to incomplete sequence data). Nucleotide positions that differ relative to the top sequence are displayed in a black background. B). Insertion sites of the B.th.I7a and b intron copies in B. thuringiensis kurstaki BGSC 4D1/HD1. Sites that exhibit identical nucleotides in both sequences are indicated by asterisks. B.th.I7a and B.th.I7b have identical sequences and are inserted in plasmidic and chromosomal loci, respectively. Intron boundaries are delimited by brackets. The intron binding sites (IBS1, IBS2, and IBS3) in the exons are boxed and their complementary exon binding sites (EBS1, EBS2, and EBS3) in the intron are indicated underneath. The similarity between the insertion sites is weak overall, and is limited to the IBS2 motif, suggesting retrotransposition of B.th.I7 into ectopic sites

Back to article page