title: A note on the hypothesis: Protein polymorphism as a phase of molecular evolution.
abstract: Assuming that various kinds of balancing selection contribute only a small fraction of naturally occuring genetic variation, it is shown that if a fair fraction of evolutionary change in protein is due to neutral mutants, most of naturally occurring polymorphism must be due to random drift of neutral genes.
authors.affiliation: National Institute of Genetics, 411, Mishima, Shizuoka-ken, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Maruyama