Rockefeller University

Molecule stops DNA replication in its tracks

(PhysOrg.com) -- When a dividing cell duplicates its genetic material, a molecular machine called a sliding clamp travels along the DNA double helix, tethering the proteins that perform the replication. Researchers ...

Oct 20, 2008 4 / 5 (3) 0

Astrocytes and synaptic plasticity

By mopping up excess neurotrophic factor from neuronal synapses, astrocytes may finely tune synaptic transmission to affect processes such as learning and memory, say Bergami et al.

Oct 13, 2008 5 / 5 (7) 0

Newly identified cells make fat

To understand where fat comes from, you have to start with a skinny mouse. By using such a creature, and observing the growth of fat after injections of different kinds of immature cells, scientists at the ...

Oct 04, 2008 5 / 5 (2) 0

Stem cells stand up for themselves

Adult stem cells are not pampered pushovers. O'Reilly et al. report that certain stem cells take charge of their surroundings, molding their environment to control their division and differentiation.

Aug 25, 2008 not rated yet 0

A snooze button for the circadian clock

We may use the snooze button to fine-tune our sleep cycles, but our cells have a far more meticulous and refined system. Humans, and most other organisms, have 24-hour rhythms that are regulated by a precise molecular clock ...

Aug 14, 2008 5 / 5 (3) 0