Figure 3

Gag comparison between class I and Athila/Tat LTR retroelements of plants. The Retroviridae differentiation into the 3 classes reveals how based on the CA-NC region, class I gammaretroviruses and Athila/Tat LTR retroelements of plants are more similar than previously supposed. Among others features in common (underlined and named following the nomenclature of Figure 2), both Athila/Tat and class I gags are characterized by the presence of a single CCHC array at NC. Note, however, how Tat NCs exhibit a CHHC motif substituting the canonical CCHC array.