As a human embryo grows, a set of molecules directs cells as they multiply and take on specific identities and spatial positions within the embryo. In one crucial step known as gastrulation, these ...

Barriers between stem cells play a crucial role in human development—and offer a new potential route for fertility treatment SAN FRANCISCO, CA—As a human embryo grows, a set of molecules directs cells ...

Our skin and mucous membranes are protected by epithelial cells. This 'barrier' tissue performs its function thanks to specialized structures called 'junctions'. They ensure cell cohesion and regulate ...

Janelia researchers have uncovered a novel way that two of the structures inside cells—the endoplasmic reticulum (ER) and ...

Scientists are one step closer to understanding the 170 billion brain cells that allow us to walk, talk, and think. A newly published atlas offers the most detailed maps yet of the location, structure ...

In pink, wild type cells expressing gamma actin. In black, knock-out cells that do not express gamma actin. The yellowish lines reveal the tortuous nature of the junctions. Our skin and mucous ...