Related Experiment Video
Updated: Mar 29, 2026
09:40
A Mass Spectrometry-Based Proteomics Approach for Global and High-Confidence Protein R-Methylation Analysis
Published on: April 28, 2022
3.1K
Recommended Mass Spectrometry-Based Strategies to Identify Ricin-Containing Samples
Suzanne R Kalb1, David M Schieltz2, François Becher3
1Centers for Disease Control and Prevention, 4770 Buford Hwy NE, Atlanta, GA 30341, USA. skalb@cdc.gov.
Toxins
|November 28, 2015
Summary
Mass spectrometry (MS) assays accurately detect and differentiate ricin and RCA120 toxins from castor beans in complex samples. These methods provide reliable quantification and activity ranking, proving valuable for toxin analysis.
Area of Science:
- Toxicology
- Analytical Chemistry
- Biochemistry
Background:
- Ricin and RCA120 are toxic proteins from Ricinus communis.
- Accurate detection and differentiation are crucial for safety and research.
- Mass spectrometry (MS) offers high specificity for protein analysis.
Purpose of the Study:
- To evaluate MS-based methods for detecting, differentiating, and quantifying ricin and RCA120.
- To assess the performance of MS in a proficiency testing setting (EQuATox).
- To determine the suitability of MS for analyzing complex biological matrices.
Main Methods:
- Application of mass spectrometry (MS) assays.
- Analysis of nine blinded samples from the EQuATox proficiency test.
- Differentiation based on amino acid sequence determination.
- Monitoring active ricin via nucleic acid substrate depurination.
Main Results:
- MS successfully identified ricin and RCA120 in most samples.
- Differentiation of ricin from RCA120 was highly successful using amino acid data.
- MS provided semi-quantitative results, ranking sample functional activities.
- The lowest concentration sample (0.414 ng/mL) was the only exception for detection.
Conclusions:
- MS-based assays are highly effective for detecting ricin and RCA120.
- Mass spectrometry excels at differentiating these related toxins.
- MS provides valuable semi-quantitative data on toxin activity.
- These methods are robust for analyzing ricin and RCA120 in complex matrices.
Related Concept Videos
01:19MALDI-TOF Mass Spectrometry
7.5K
Mass spectrometry is a powerful characterization technique that can identify and separate a wide variety of compounds ranging from chemical to biological entities, based on their mass-to-charge ratio (m/z). The instruments that allow this detection, known as mass spectrometers, have three components: an ion source, a mass analyzer, and a detector. These spectrometers differ based on the nature of their ion source and analyzers.Matrix-assisted laser desorption ionization (MALDI) is a commonly...
7.5K
01:21Mass Spectrometry: Complex Analysis
2.1K
Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
2.1K