Richard S. Johnson

Mass spectrometry of Mag-Net-enriched plasma extracellular vesicles from 86 C57BL/6J mice reveals 272 age-correlated proteins, sex-divergent trajectories, and an age clock with 2.75-month mean absolute error.

The paper investigates how knocking out the doublesex gene in Drosophila affects metabolomic differences between sexes, finding that dsx significantly influences sex-specific metabolites across tissues.

The paper develops a method to assess solution properties of designed proteins using mass spectrometry and peptide barcoding, enabling analysis of large protein libraries.

The paper introduces a framework for quality control in quantitative proteomics, combining internal and external QC measures with tools for data analysis and deposition.

The paper uses isotope-labeled crosslinkers to analyze protein interactions and posttranslational modifications in Diaphorina citri across life stages, revealing developmental changes in chromatin structure.