Fig. 3From: Gel electrophoresis of human sperm: a simple method for evaluating sperm protein qualityFive representative human sperm extracts (1–5) that had been treated (P.I+) or not (P.I-) with a protease inhibitor cocktail. Fifteen μg of proteins extracted from individual samples were loaded in each lane, separated on a 4–12% polyacrylamide gel, and stained with Coomassie Blue. PI: protease inhibitorBack to article page