PIP and Reduced sperm motility: The significance of the same protein (SABP) and its relation to poor sperm quality was also indicated in the study of Capkova et al., where sperm samples of fertile and non-fertile men were studied by western blotting and matrix-assisted laser desorption/ionization mass spectrometry and SABP protein was found to be overexpressed in asthenospermia or oligoasthenospermia compared to normal semen.