Publications by authors named "Marcel Grapp"

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Detection of 11-nor-9-carboxy-hexahydrocannabinol (HHC-COOH) as metabolite of both hexahydrocannabinol (HHC) and Δ-tetrahydrocannabinol (Δ-THC) in routine forensic samples.
Marcel Grapp, Christoph Kaufmann, Andreas Peschel, Meike Potzscher, Marek Dziadosz

J Pharm Biomed Anal· August 2025

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Toxicological Investigation of a Case Series Involving the Synthetic Cathinone α-Pyrrolidinohexiophenone (α-PHP) and Identification of Phase I and II Metabolites in Human Urine.
Marcel Grapp, Christoph Kaufmann, Hannes M Schwelm, Merja A Neukamm

J Anal Toxicol· March 2023

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Intoxication cases associated with the novel designer drug 3',4'-methylenedioxy-α-pyrrolidinohexanophenone and studies on its human metabolism using high-resolution mass spectrometry.
Marcel Grapp, Christoph Kaufmann, Hannes M Schwelm, Merja A Neukamm, Sabine Blaschke

Drug Test Anal· September 2020

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New synthetic opioid cyclopropylfentanyl together with other novel synthetic opioids in respiratory insufficient comatose patients detected by toxicological analysis.
Dieter Müller, Hartmud Neurath, Merja A Neukamm, Maurice Wilde, Caroline Despicht, Marcel Grapp

Clin Toxicol (Phila)· September 2019

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Systematic forensic toxicological analysis by liquid-chromatography-quadrupole-time-of-flight mass spectrometry in serum and comparison to gas chromatography-mass spectrometry.
Marcel Grapp, Christoph Kaufmann, Frank Streit, Lutz Binder

Forensic Sci Int· June 2018

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Toxicological investigation of forensic cases related to the designer drug 3,4-methylenedioxypyrovalerone (MDPV): Detection, quantification and studies on human metabolism by GC-MS.
Marcel Grapp, Christoph Kaufmann, Martin Ebbecke

Forensic Sci Int· April 2017

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Systematic forensic toxicological analysis by GC-MS in serum using automated mass spectral deconvolution and identification system.
Marcel Grapp, Hans H Maurer, Herbert Desel

Drug Test Anal· August 2016

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GC-MS analysis of the designer drug α-pyrrolidinovalerophenone and its metabolites in urine and blood in an acute poisoning case.
Marcel Grapp, Christoph Sauer, Christian Vidal, Dieter Müller

Forensic Sci Int· February 2016

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Choroid plexus transcytosis and exosome shuttling deliver folate into brain parenchyma.
Marcel Grapp, Arne Wrede, Michaela Schweizer, Sabine Hüwel, Hans-Joachim Galla

Nat Commun· December 2013

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Structure and activity of the only human RNase T2.
Andrea Thorn, Robert Steinfeld, Marc Ziegenbein, Marcel Grapp, He-Hsuan Hsiao

Nucleic Acids Res· September 2012

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Function of Ech hydrogenase in ferredoxin-dependent, membrane-bound electron transport in Methanosarcina mazei.
Cornelia Welte, Verena Kallnik, Marcel Grapp, Gunes Bender, Steve Ragsdale

J Bacteriol· February 2010

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Folate receptor alpha defect causes cerebral folate transport deficiency: a treatable neurodegenerative disorder associated with disturbed myelin metabolism.
Robert Steinfeld, Marcel Grapp, Ralph Kraetzner, Steffi Dreha-Kulaczewski, Gunther Helms

Am J Hum Genet· September 2009

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The homeodomain of PAX6 is essential for PAX6-dependent activation of the rat glucagon gene promoter: evidence for a PH0-like binding that induces an active conformation.
Marcel Grapp, Sabine Teichler, Julia Kitz, Payam Dibaj, Corinna Dickel

Biochim Biophys Acta· May 2009

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Structure of tripeptidyl-peptidase I provides insight into the molecular basis of late infantile neuronal ceroid lipofuscinosis.
Aritra Pal, Ralph Kraetzner, Tim Gruene, Marcel Grapp, Kathrin Schreiber

J Biol Chem· February 2009

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