Schematic representation of CRM1TR and CRM4TR, their parent elements and transcripts. Schematic illustrations (from top to bottom) of CRM1B LTR-UTR region, CRM1TR dimer (from locus I), CRM1TR derived EST, CRM4B LTR-UTR region, CRM4TR dimer, CRM4TR derived EST, and 3 full length spliced cDNAs derived from CRM4TR repeats. The CRM-derived tandem repeats, CRM1TR and CRM4TR, consist of part of LTR (red) and UTR (dark blue and orange) of the parent elements. Other regions of the parental UTR not included in the tandem repeats are shown in yellow and light blue. Four black vertical bars in the LTR regions of CRM1B and CRM4B mark conserved motifs, i.e. TATA-like box, recombination breakpoint, a C-rich and T-rich region respectively. CRM1TR and CRM4TR monomers both terminate within a region conserved between CRM1B and CRM4 UTRs; the first 100 nucleotides and the last 143 nucleotides of this UTR region are shown in orange and yellow respectively. White dotted arrows within the parental elements indicate the region that formed full length CRM1TR and CRM4TR monomers. Maroon, magenta, and green arrows underneath the CRM1TR dimer indicate subsequences S, IR, and EB (see text for details). Dotted connectors in cDNAs indicate spliced introns. m1 and m2 = monomers 1 and monomer 2. Full length cDNA BT019305.1 was reverse complemented.
Sharma et al. BMC Genomics 2013 14:142 doi:10.1186/1471-2164-14-142