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Phylogenetic tree of expansins in soybean and Arabidopsis. Using expansins in soybean and Arabidopsis, a phylogenetic tree was constructed using the neighbor-joining method with 1,000 bootstraps in MEGA 7.0 and was modified by EvolView. The four expansin subfamilies are: EXPA, α-expansin; EXPB, β-expansin; EXLA, expansin-like A; and EXLB, expansin-like B.
