Regulating the nuclear architecture of the cell

An organelle called the nucleolus resides deep within the cell nucleus and performs one of the cell's most critical functions: it manufactures ribosomes, the molecular machines that convert the genetic information carried ...

Muscle and bone from an ink-jet printer

A Pittsburgh-based research team has created and used an innovative ink-jet system to print "bio-ink" patterns that direct muscle-derived stem cells from adult mice to differentiate into both muscle cells and bone cells.

Embryonic patterning makes the feathers fly

How the chicken got its feathers in the right place is not a Rudyard Kipling “Just So” story, but an illustration of how simple causes can stack up into complicated results. For a chicken, it’s the difference between ...