Figure 1
From: Mutations in the Lactococcus lactis Ll.LtrB group II intron that retain mobility in vivo
Secondary structure model of the Ll.LtrB group II intron. The model is based on the general structure described for group IIA introns in Toor et al., 2001 [13]. The bottom structure depicts the entire intron, while the one at the top is a detailed representation of DIV. Domains are indicated by Roman numerals I-VI and sub-domain structures are denoted by letters and numbers. EBS and IBS interacting elements are marked and tertiary interactions are represented by Greek letters. η, η' and ζ elements are marked with dotted lines because of uncertainty in their prediction. The point mutations and deletions (whose boundaries are defined by brackets) are shown in gray.