Structure of the model. Structure of the model for the case n = 5. Variables xiin the circles represent the proportion of the population carrying i genes of the 5-gene pathway in a genome. Horizontal arrows to the left indicate the effects of deletions. Curved arrows to the right show the effect of horizontal transfer. Fitnesses are depicted by arrows below populations.
Francis and Tanaka BMC Evolutionary Biology 2012 12:55 doi:10.1186/1471-2148-12-55