Figure 7

GPY/F motif transitions. The amino acid motif that gives its name to the GPY/F module at INT of Ty3/Gypsy and Retroviridae LTR retroelements is polymorphic. While the modules of Retroviridae class I and Ty3/Gypsy elements of plants and fungi, usually preserve the canonical GPY/F motif, classes II and III, and bilateria Ty3/Gypsy LTR retroelements display a number of module isoforms based on that motif.