Synonymous mutations make dramatic contributions to fitness when growth is limited by a weak-link enzyme.
Kristofich J, Morgenthaler AB, Kinney WR, Ebmeier CC, Snyder DJ, Old WM, Cooper VS, Copley SD. Synonymous mutations make dramatic contributions to fitness when growth is limited by a weak-link enzyme. PLoS Genet. 2018 08; 14(8):e1007615.