ArticleBio-protocol2020
Pipecolic Acid Quantification Using Gas Chromatography-coupled Mass Spectrometry.
Article in Bio-protocol, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
7 citing papers in PubMed, 7 citations in OpenAlex.
- Excess nitric oxide alters cellular pH to restrict salicylic acid movement and systemic immunity.Science advances · 2026Article
- Article
- Simultaneous Quantification of Salicylic Acid, Pipecolic Acid, and N-Hydroxypipecolic Acid in Plants Using High-Performance Liquid Chromatography Coupled with Tandem Mass Spectrometry.Methods in molecular biology (Clifton, N.J.) · 2026Article
- Piperideine-6-carboxylic acid regulates vitamin B6 homeostasis and modulates systemic immunity in plants.Nature plants · 2025Article
- Integration of LC-MS-Based and GC-MS-Based Metabolic Profiling to Reveal the Effects of Domestication and Boiling on the Composition of Duck Egg Yolks.Metabolites · 2023Article
- Untargeted metabolomics unravel serum metabolic alterations in smokers with hypertension.Frontiers in physiology · 2023Article
- Phased small RNA-mediated systemic signaling in plants.Science advances · 2022Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Pipecolic acid (Pip), a non-proteinacious product of lysine catabolism, is an important regulator of immunity in plants and humans alike. For instance, Pip accumulation is associated with the genetic disorder Zellweger syndrome, chronic liver diseases, and pyridoxine-dependent epilepsy in humans. In plants, Pip accumulates upon pathogen infection and is required for plant defense. The aminotransferase ALD1 catalyzes biosynthesis of Pip precursor piperideine-2-carboxylic acid, which is converted to Pip via ornithine cyclodeaminase. A variety of methods are used to quantify Pip, and some of these involve use of expensive amino acid analysis kits. Here, we describe a simplified procedure for quantitative analysis of Pip from plant tissues. Pipecolic acid was extracted from leaf tissues along with an internal standard norvaline, derivatized with propyl chloroformate and analyzed by gas chromatography-coupled mass spectrometry using selective ion mode. This procedure is simple, economical, and efficient and does not involve isotopic internal standards or multiple-step derivatizations.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.