Fig. 2From: Gel electrophoresis of human sperm: a simple method for evaluating sperm protein qualityMembrane protein bands from two representative human sperm extracts (a, b). Fifteen, 20, 25 and 30 μg of proteins extracted from individual samples were loaded in each lane, separated on a 4–12% polyacrylamide gel, and stained with Coomassie Blue. a: stained bands at 110 and 80 kDa; b: absence of bands at 110 and 80 kDaBack to article page