Figure 4

Result of CG-skew analysis of LTR regions, showing the DNA composition computed in a sliding window of 100 bp with a step of one base. (a) Pisum sativum RLC-Angela-FJ434420, (b) Medicago truncatula homolog, (c) Oryza sativa RIRE-1, (d) Horderum vulgare BARE-1. Positive GC-skew values indicate an overrepresentation of G bases, whereas negative GC-skew values represent an overabundance of C bases.