Natural selection and the evolution of neutralism.
The efficiency of evolutionary search increases as the density of acceptable proteins in a protein space increases. Populations caught in regions whose density is too low to support evolution can be pulled into high density regions by hitchhiking selection. As they move into such regions, the action of natural selection becomes more effective, yet these populations will satisfy conditions which lead to predictions made by neutral, so-called non-Darwinian models.
D000595:Amino Acid Sequence; D005075:Biological Evolution; D014644:Genetic Variation; D008954:Models, Biological; D009154:Mutation; D011506:Proteins / Q000235:genetics*; D012641:Selection, Genetic
D011506:Proteins