Potassium ions modulate expression of mouse sperm fertilizing ability, acrosome reaction and hyperactivated motility in vitro.

@article{Fraser1983PotassiumIM,
  title={Potassium ions modulate expression of mouse sperm fertilizing ability, acrosome reaction and hyperactivated motility in vitro.},
  author={Lynn R. Fraser},
  journal={Journal of reproduction and fertility},
  year={1983},
  volume={69 2},
  pages={539-53}
}
In K+-free medium, epididymal sperm suspensions, whether washed free of epididymally-derived K+ or not, were unable to penetrate washed cumulus masses; some penetration of zona-free eggs was obtained with unwashed sperm suspensions, while washed samples were generally non-fertilizing. Within 5 min of K+ introduction, however, spermatozoa were able to fertilize intact eggs rapidly and synchronously, indicating that K+ was not required for capacitation. Measurements of extracellular K… CONTINUE READING