Quantcast
issue
Read articles, including Science News stories written for ages 9-14, on the SNK website.
SPERM SHUTOFF

After a mouse egg is fertilized, an enzyme called ovastacin breaks apart a key binding protein, preventing sperm from attaching (left, two different views). Without ovastacin, sperm continue to attach (right) even after cell division. Credit: A.D. Burkart et al/J. of Cell Biology 2012

Follow Us
blogs & columns
multimedia
Not to miss
bookshelf