Results 1 to 10 of about 14,286,973 (221)

L-Tryptophan Stimulates Bioactive Metabolite Accumulation and Cell Wall Remodelling in Flax Callus Cultures [PDF]

Molecules
While L-tryptophan is a precursor of plant growth regulators, its effects on secondary metabolism, amino acid profile and cell wall organization in flax callus remain underexplored.
Kornelia L. Tudruj, Michał Piegza, Lucyna Dymińska, Maja Słupczyńska, Magdalena Wróbel-Kwiatkowska   +4 more
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A comprehensive review and comparison of L-tryptophan biosynthesis in Saccharomyces cerevisiae and Escherichia coli [PDF]

Frontiers in Bioengineering and Biotechnology, 2023
L-tryptophan and its derivatives are widely used in the chemical, pharmaceutical, food, and feed industries. Microbial fermentation is the most commonly used method to produce L-tryptophan, which calls for an effective cell factory.
Xinru Ren, Yue Wei, Honglu Zhao, Juanjuan Shao, Fanli Zeng, Fanli Zeng, Zhen Wang, Zhen Wang, Li Li   +8 more
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Environmental Sustainability Analysis of L-Tryptophan as a Consumer Product and Intermediate to Pharmaceutical Active Ingredients

Frontiers in Sustainability, 2022
L-tryptophan is a naturally occurring α-amino acid that is also purchased by consumers for medicinal and dietary purposes. L-tryptophan is also a starting point for synthesizing medical derivatives with antiplatelet aggregation and antibacterial activity.
Alan Overcash, Alan Overcash, Evan Griffing, Evan Griffing, Sumesh Sukumara, Michael Overcash, Michael Overcash   +6 more
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Dietary L-tryptophan supplementation alleviates ammonia-induced stress in Nile tilapia fingerlings [PDF]

Scientific Reports
L-tryptophan dietary supplementation is a useful tactic to increase aquatic animals’ energy stores and antioxidant capability, thereby enhancing their resistance to environmental stressors like ammonia stress.
Eman Y. Mohammady, Amina Y. Kamal, Mohamed A. Elashry, Abdelkarim I. M. El-Sayed, Mohamed S. Hassaan   +4 more
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Genetic regulation of l-tryptophan metabolism in Psilocybe mexicana supports psilocybin biosynthesis [PDF]

Fungal Biology and Biotechnology
Background Although Basidiomycota produce pharmaceutically and ecologically relevant natural products, knowledge of how they coordinate their primary and secondary metabolism is virtually non-existent.
Paula Sophie Seibold, Sebastian Dörner, Janis Fricke, Tim Schäfer, Christine Beemelmanns, Dirk Hoffmeister   +5 more
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Safety and efficacy of a feed additive consisting of l‐tryptophan produced with Escherichia coli CCTCC M 2024517 for all animal species (Anhui Huaheng Biotechnology Co., Ltd.) [PDF]

EFSA Journal
Following a request from the European Commission, EFSA was asked to deliver a scientific opinion on the safety and efficacy of l‐tryptophan produced with a genetically modified strain of Escherichia coli (CCTCC M 2024517) as a nutritional additive in ...
EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP), Roberto Edoardo Villa, Giovanna Azimonti, Eleftherios Bonos, Henrik Christensen, Mojca Durjava, Birgit Dusemund, Ronette Gehring, Boet Glandorf, Maryline Kouba, Marta López‐Alonso, Francesca Marcon, Carlo Nebbia, Alena Pechová, Miguel Prieto‐Maradona, Ilen Röhe, Katerina Theodoridou, Montserrat Anguita, Matteo L. Innocenti, Jordi Tarrés‐Call, Nicole Bozzi Cionci   +20 more
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Safety and efficacy of a feed additive consisting of l‐tryptophan produced with Corynebacterium glutamicum KCCM 80346 for all animal species (CJ Europe GmbH) [PDF]

EFSA Journal
Following a request from the European Commission, EFSA was asked to deliver a scientific opinion on the safety and efficacy of the feed additive consisting of l‐tryptophan produced by fermentation with a genetically modified strain of Corynebacterium ...
EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP), Roberto Edoardo Villa, Giovanna Azimonti, Eleftherios Bonos, Henrik Christensen, Mojca Durjava, Birgit Dusemund, Ronette Gehring, Boet Glandorf, Maryline Kouba, Marta López‐Alonso, Francesca Marcon, Carlo Nebbia, Alena Pechová, Miguel Prieto‐Maradona, Ilen Röhe, Katerina Theodoridou, Luca Tosti, Montserrat Anguita, Nicole Bozzi Cionci, Joana P. Firmino, Matteo L. Innocenti, Jordi Tarrés‐Call, Elisa Pettenati   +23 more
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Effects of Prepartum L-Tryptophan Supplementation on the Postpartum Performance of Holstein Cows [PDF]

Animals
The negative energy balance occurring in the periparturient period of cows will impede their health and postpartum performance. To target this issue, L-tryptophan was supplied to the prepartum cows.
Xuening Liu, Songyang Yao, Yunjie Liu, Huigang Han, Weijia Wang, Qi Yi, Laiqing Yan, Pengyun Ji, Lu Zhang, Guoshi Liu   +9 more
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Novel L-tryptophan-functionalized zirconium dioxide nanoparticles catalysed one-pot and solvent-free synthesis of 2 H-indazolo [2, 1-b] phthalazine-triones [PDF]

Scientific Reports
Zirconia nanoparticles modified with L-tryptophan (ZrO₂@L-Try) demonstrate increased biocompatibility and catalytic activity by capitalizing on the bioactive properties of L-tryptophan, a crucial amino acid known for its role in protein synthesis and ...
Ali Kareem Abbas, Javad Safaei-Ghomi, Samira Moein-Najafabadi   +2 more
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Scientific Opinion on the safety and efficacy of L-tryptophan technically pure produced by fermentation with Escherichia coli for all animal species, based on a dossier submitted by HELM AG on behalf of Global Bio-Chem Technology [PDF]

EFSA Journal, 2014
The product L-tryptophan is a feed additive produced by fermentation with a genetically modified (GM) strain of Escherichia coli. The amino acid L-tryptophan itself is considered safe for the target animals, the consumer and the environment. However, the
EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP)
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