Figure 4
From: A comparative computational analysis of nonautonomous Helitron elements between maize and rice
Examples of the free energy of folding for palindromes in maize helitrons. Helitrons can be loosely categorized on the basis of the folding strength of the 3' hairpin relative to the other hairpins throughout the helitron sequence. The top panel shows helitron2, which has a strong 3' palindrome; nine of 35 maize helitrons exhibit this pattern. Another ten helitrons contain 3' palindromes of medium folding energy (helitron1, center), and 16 have 3' hairpins with a weak folding properties (Helitr on14, bottom). Shading indicates the region containing the most 3' palindrome.