In addition, model M2a and M8 suggested that 0.78% and 1.23% of sites were under positive selection with ω>1, although the LRT of M8/M8a and M2a/M1a did not achieve significance ( Table S4 ).
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In addition, model M2a and M8 suggested that 0.78% and 1.23% of sites were under positive selection with ω>1, although the LRT of M8/M8a and M2a/M1a did not achieve significance ( Table S4 ).