Hyalin

From Wikipedia, the free encyclopedia

For the color, see Hyaline.

For hyaline cartilage, see cartilage.

Hyalin is a protein released from the cortical granules of a fertilized animal egg. The released hyalin modifies the extracellular matrix of the fertilized egg to block other sperm from binding to the egg, and is known as the slow-block to polyspermy. All animals have this slow-block mechanism.