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Simple model cell is key to understanding cell complexity

A team of Penn State researchers created a simple artificial cell with a mix of PEG and dextran polymers to investigate the organization and function of cell components. The model cell exhibited polarity, a critical step in development, and showed the interrelationship between cytoplasm and cell membrane.

SourcePenn State·JournalJournal of the American Chemical Society·DateMay 15, 2008

Vax and Pax: Taking turns to build an eye

Researchers found that Vax2 protein shuttles between nucleus and cytoplasm in response to Sonic hedgehog signaling molecule. In its nuclear state, Vax2 represses Pax6, allowing optic nerve development. In contrast, Pax6 regulates retinal fate. This coordination is crucial for proper eye development.

SourceSalk Institute·JournalGenes & Development·DateOct 14, 2006

New gene regulation mechanism discovered

Scientists at Cold Spring Harbor Laboratory identified a messenger RNA molecule that switches from non-protein coding status to protein coding status in response to cellular stress. This 'cut and run' mechanism likely controls the expression of many genes, providing a rapid response to viral infection or other stresses.