They are most common on the T-zone of the face, especially on the nose. Alicia Zalka, MD, compares sebaceous filaments to ...

At the leading edge of a moving cell, actin filaments are rapidly polymerizing; at its rear edge, they are quickly depolymerizing (Figure 5). A large number of other proteins participate in actin ...

Credit: Davide Tornotti/University of Milano-Bicocca/MPA On a large scale, the universe is like a complex spider web, full of cosmic filaments of gas, dust and dark matter, separated by large voids.