Fig. 3. Scatterplots showing relationships between the proportions of fast-linear spermatozoa present before (time 0 min) and after (time 7 min) bicarbonate/CO₂ activation in the absence (A) and presence (B) of solubilised apical plasma membrane protein fraction (sAPM). Each data point represents a separate boar ejaculate; N=7 in this graph because matched data was not available for one boar. (C) Ranking of boars in descending order of the proportion of fast-linear spermatozoa after 7 min in the absence of sAPM; control); the equivalent ranking is changed in the presence of sAPM.