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Ultra-high-throughput and low-volume analysis of intact proteins with LAP-MALDI MS

Challen, B., Morris, M. and Cramer, R. ORCID: (2023) Ultra-high-throughput and low-volume analysis of intact proteins with LAP-MALDI MS. Journal of the American Society for Mass Spectrometry, 34 (6). pp. 991-994. ISSN 1879-1123

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To link to this item DOI: 10.1021/jasms.3c00068


High-throughput (HTP) mass spectrometry (MS) is a rapidly growing field, with many techniques evolving to accommodate ever increasing sample analysis rates. Many of these techniques, such as AEMS and IR-MALDESI MS, require volumes of at least 20–50 μL for analysis. Here, liquid atmospheric pressure-matrix-assisted laser desorption/ionization (LAP-MALDI) MS is presented as an alternative for ultra-high-throughput analysis of proteins requiring only femtomole quantities of protein in 0.5 μL droplets. By moving a 384-well microtiter sample plate with a high-speed XY-stage actuator, sample acquisition rates of up to 10 samples per second have been achieved at a data acquisition rate of 200 spectra per scan. It is shown that protein mixture solutions with concentrations of ≤2 μM can be analyzed at this speed, while individual protein solutions can be analyzed at concentrations of ≤0.2 μM. Thus, LAP-MALDI MS provides a promising platform for multiplexed HTP protein analysis.

Item Type:Article
Divisions:Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:111859
Publisher:American Chemical Society


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