
Big Expansion Enables Simple Microscopes to See Amino Acids in Proteins
Researchers boosted sample size up to 1,000-fold per dimension with a new hydrogel recipe and ONE microscopy, allowing ordinary light microscopes to pinpoint amino acids within proteins (including GFP and a nanobody) and map protein structures at near-nanometer detail. While still short of cryo-EM/X-ray resolution, the approach could democratize high-resolution structural biology by making detailed molecular layouts accessible with standard fluorescence microscopes.

