Proteins

Which mattered first at the dawn of life: proteins or nucleic acids? Proteins may have had the edge if a theorized process let them grow long enough to become self-replicating catalysts.

An unexpected mechanism allows wasps to rapidly co-opt genes for new toxic functions.

The proteins that unravel as the temperature starts to rise turn out to be among the most vital.

Without viruses, we might never have evolved.

Proteins work like rigid keys to activate cellular functions — or so everyone thought. Scientists are discovering a huge number of proteins that shape-shift to do their work, upending a century-old maxim of biology.