Phenotypic variation in Pseudomonas sp. CM10 determines microcolony formation and survival under protozoan grazing

Matz C, Deines P, Jürgens K (2002); FEMS Microbiol Ecol., 39(1):57-65. doi: 10.1111/j.1574-6941.2002.tb00906.x

Female sticklebacks count alleles in a strategy of sexual selection explaining MHC polymorphism. Ratios of radical to conservative amino acid replacement are affected by mutational and compositional factors and may not be indicative of positive Darwinian selection.