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 ...

The formation of tight junctions by parietal epithelial cells (PECs) creates a barrier that confines proteins to the Bowman's space, say the researchers of a new study. Disruption of these tight ...

The intestinal epithelium is a dynamic cellular layer that serves as a barrier between luminal contents and the underlying immune system while simultaneously supporting water, nutrient and ion ...

Cell-to-cell junctions were visualized by ZO1-GFP, and the dynamics of cell junctions were captured by movies. When the cells indicated by * were spontaneously stretched, a continuous belt of cell ...

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 ...