Dr. Lingjun Li

Lingjun received her BE degree in Environmental Analytical Chemistry from Beijing Polytechnic University and a PhD degree in Analytical Chemistry/Biomolecular Chemistry from University of Illinois at Urbana-Champaign. She did three-way postdoctoral research at the Pacific Northwest National Laboratory, Brandeis University, and University of Illinois before joining the School of Pharmacy faculty in 2002. She currently holds joint appointments in the School of Pharmacy and Department of Chemistry at UW-Madison, as well as being named Charles Melbourne Johnson Distinguished Chair and Vilas Distinguished Achievement Professor.

Andrew, Hannah, and Zicong successfully defends his second-year thesis background examination!


Our third-year students are all officially dissertators! Congratulations Dylan, Jericha, Bin, Gutin, Yuan, Graham, Ashley, and Danqing!


Analysis of pancreatic extracellular matrix protein post-translational modifications via electrostatic repulsion-hydrophilic interaction chromatography coupled with mass spectrometry

Molecular Omics

The pancreas is a vital organ with digestive and endocrine roles, and diseases of the pancreas affect millions of people yearly. A better understanding of the pancreas proteome and its dynamic post-translational modifications (PTMs) is necessary to engineer higher fidelity tissue analogues for use in transplantation. The extracellular matrix (ECM) has major roles in binding and signaling essential to the viability of insulin-producing islets of Langerhans. To characterize PTMs in the pancreas, native and decellularized tissues from four donors were analyzed...


Recent advances in mass spectrometry analysis of neuropeptides

Mass Spectrometry Reviews

Due to their involvement in numerous biochemical pathways, neuropeptides have been the focus of many recent research studies. Unfortunately, classic analytical methods, such as western blots and enzyme-linked immunosorbent assays, are extremely limited in terms of global investigations, leading researchers to search for more advanced techniques capable of probing the entire neuropeptidome of an organism. With recent technological advances, mass spectrometry (MS) has provided methodology to gain global knowledge of a neuropeptidome on a spatial, temporal, and quantitative level...


Review of Recent Advances in Lipid Analysis of Biological Samples via Ambient Ionization Mass Spectrometry


The rapid and direct structural characterization of lipids proves to be critical for studying the functional roles of lipids in many biological processes. Among numerous analytical techniques, ambient ionization mass spectrometry (AIMS) allows for a direct molecular characterization of lipids from various complex biological samples with no/minimal sample pretreatment. Over the recent years, researchers have expanded the applications of the AIMS techniques to lipid structural elucidation via a combination with a series of derivatization strategies (e.g., the Paternò–Büchi (PB) reaction...


Erythrocyte sphingolipid species as biomarkers of Alzheimer's disease

Journal of Pharmaceutical Analysis

Screenshot 2021-09-09 105205.jpg

Mass spectrometry profiling and quantitation of changes
in circulating hormones secreted over time in Cancer borealis
hemolymph due to feeding behavior

Analytical and Bioanalytical Chemistry


DiLeuPMP: A Multiplexed Isobaric Labeling Method for Quantitative Analysis of O-Glycans

Analytical Chemistry