Research notes on the molecules shaping modern biology.

Synthesis & Manufacturing

In November 2023, Novo Nordisk committed $6 billion to expanding its Danish facility—not to improve a drug's efficacy, but to scale peptide manufacturing to meet global demand that had far exceeded production capacity.

Updated Aug 2, 2026

Cognitive Health & Aging

In 2021, researchers at Lund University began testing exenatide, a GLP-1 receptor agonist, for potential neuroprotection in Parkinson's disease—a use far removed from its original approval for type 2 diabetes.

Updated Aug 1, 2026

Synthesis & Manufacturing

Desmopressin achieves 85% absolute bioavailability via subcutaneous injection but only 0.16% via intranasal spray—a gap that illustrates how peptide bioavailability depends as much on delivery route as on molecular structure.

Updated Jul 30, 2026

Synthesis & Manufacturing

A purity certificate claiming 99 percent tells researchers almost nothing without supporting chromatography data—HPLC and mass spectrometry measure different aspects of peptide composition, and conflating them obscures what a sample actually contains.

Updated Jul 30, 2026

Peptide Mechanisms

A 15-amino acid peptide's precise sequence order—down to each individual position—determines whether it activates receptors or remains inert in animal models, a principle now central to understanding peptide amino acid sequence order biological activity.

Updated Jul 30, 2026

Synthesis & Manufacturing

In 1998, a reformulation of the blood-disorder drug Eprex triggered an unexpected immune response in European patients, revealing how peptide immunogenicity and HLA binding can transform a stable therapeutic into a liability.

Updated Jul 30, 2026