Fitness barriers limit reversion of a proofreading-deficient coronavirus
K. W. Graepel, M. L. Agostini, X. Lu, N. R. Sexton, M. R. Denison
This study shows that reversion of a proofreading-deficient coronavirus (ExoN-AA) is hindered by fitness barriers, as compensatory mutations outside the ExoN motif I are more advantageous than partial reversion.
bioRxiv · Apr 26, 2019Microbiology