Observed and expected ratios of plaque radius and plaque productivity. Ratios of plaque radii (A, C, and E) and plaque productivity (B, D, and F) are plotted against adsorption rate (A - E) or lysis time (E and F). Solid lines and numbers showed the model predictions from equations listed in Table A.2. Filled circles denote observed ratios from the Stf+ phages and open circles the Stf- phages. Plus and minus signs next to the numbers indicate Stf+ phages and Stf- phages, respectively. All values are compared against those of the wild type λ, with or without the Stf. Error bars denote the 95% confidence intervals of the observed ratios (see Methods).