Origins and evolution of the recA/RAD51 gene family ... - PNAS
Our results indicate that the recA/RAD51 family members can be divided into three major groups, designated as the recA, RADα, and RADβ subfamilies (Fig. 2A and Fig. 6, which is published as supporting information on the PNAS web site). The recA subfamily includes members from eubacteria, plants, and protists, whereas the RADα and RADβ subfamilies each contain genes from archaea and eukaryotes.
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