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Regulatory T cells (Tregs) have gone from obscurity to rock-star status in the past decade, prompting intense scrutiny—but what exactly are they? Four studies examine this question, delving deeply into the role of the transcription factor Foxp3 in governing Treg differentiation and function.
Uneasy with information websites policed by people with little expertise, scientists are creating their own online encyclopedias. But are they accessible enough to supplant Wikipedia, asks Brandon Keim.