Evolvability and Speed of Evolutionary Algorithms in Light of Recent Developments in Biology

Figure 7

Euchromatin and Heterochromatin. Histone tails have three types of modification including acetylation (Ac), phosphorylation (p), and methylation (Me). Euchromatin (a) is the loosely packed state that most histone tails are attached by acetyl groups. Heterochromatin (b) is the tightly packed state that most histone tails are attached by methyl groups. (Adapted from Jenuwein and Allis [218].)