New feature found in human sperm using Nobel-winning method
Using cryo-electron microscopy, whose developers won the 2017 Chemistry Nobel, Swedish researchers have identified a new nanostructure inside human sperm tail. The method produced 3D images by freezing the sperm to about -150ÂºC, which showed a spiral structure stretching in from the tip. Scientists believe it prevents the sperm from growing and shrinking, helping them swim towards the egg.