THE SCIENCE

Two New Peptides Came From a Marine Bacterium. They Inhibited Some Bacteria, Not Others

The search for antibiotics has an inconvenient truth: some of the most promising new molecules come from organisms that have been making chemical weapons...

Scientists Designed Protein Scissors From Scratch. Some Cut Disease-Linked Targets

Proteins that cut other proteins are among biology's most consequential tools. They digest food, process hormones, remodel tissue and help regulate signaling. Their power...

A Cyclic Peptide Blocked TIM-3 in Mice. Cancer Immunotherapy Is the Bigger Test

Modern cancer immunotherapy works partly by removing molecular brakes from immune cells. The problem is that releasing one brake does not always restore an exhausted...

A Glass Made From Tiny Peptides Can Heal Its Own Cracks

Glass is usually associated with brittleness: once a crack appears, repair often requires heat, adhesives or replacement. A materials-science paper in Nano Letters describes a...

A Peptide Hydrogel Switches Jobs as Wound Chemistry Changes

An infected wound does not remain chemically constant while it heals. Its acidity, inflammatory environment and microbial burden change, often at different rates. A paper...

Exercise, MOTS-c and Fatty Liver: The Mouse Study Behind a Compelling Mechanism

Exercise helps metabolic health, but the signals that travel from working muscle to other organs are still being mapped. A paper published October 22...

Peptide Glass That Repairs Cracks Without Heating

Glass is usually associated with brittleness: once a crack appears, repair often requires heat, adhesives or replacement. A materials-science paper in Nano Letters describes...

An 8–6 Vote Is Not FDA Approval. The Difference Matters.

Eight to six. That number has traveled around the peptide internet as if it were a product approval code. It is not. What the Advisory Committee Actually...