Newly identified bacteria-killing protein needs vitamin A to work

People who have inadequate vitamin A in their diets are more susceptible to skin infection, yet how that vitamin affects skin immunity has been unclear. In a study published today, UT Southwestern researchers shed some light ...

How a declining environment affects populations

Stable ecosystems occasionally experience events that cause widespread death—for example, bacteria in the human gut may be wiped out by antibiotics, or ocean life may be depleted by overfishing. A new study from MIT physicists ...

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