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Safety and efficacy of the feed additives l‐cysteine and l‐cysteine hydrochloride (monohydrate and anhydrous) for all animal species (Wacker Chemie AG) [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‐cysteine and l‐cysteine hydrochloride (monohydrate and anhydrous) as flavouring feed additives for all animal species.
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, Joana P. Firmino   +19 more
doaj   +2 more sources

Exchange of the l-cysteine exporter after in-vivo metabolic control analysis improved the l-cysteine production process with engineered Escherichia coli [PDF]

Microbial Cell Factories
Background l-Cysteine is a proteinogenic amino acid of high pharmaceutical and industrial interest. However, the fermentation process for l-cysteine production is faced with multiple obstacles, like the toxicity of l-cysteine for the cells, the low ...
Daniel Alejandro Caballero Cerbon, Dirk Weuster-Botz   +1 more
doaj   +2 more sources

L-cysteine mitigates busulfan-induced testicular injury through modulation of CBS/H2S axis [PDF]

Frontiers in Cell and Developmental Biology
Global male infertility, characterized by decreased spermatogenesis and sperm quality, is a significant concern. L-cysteine, essential for hydrogen sulfide (H2S) synthesis, offers numerous biological advantages.
Song Liu, Song Liu, Bin Wei, Bin Wei, Han Wei, Anran Xu, Anran Xu, Lianbing Sheng, Lianbing Sheng, Xiangyang Sun, Xiangyang Sun, Yunling Dong, Yunling Dong, Huijun Yang, Huijun Yang   +14 more
doaj   +2 more sources

Challenges and Advances in the Bioproduction of L-Cysteine [PDF]

Molecules
L-cysteine is a proteogenic amino acid with many applications in the pharmaceutical, food, animal feed, and cosmetic industries. Due to safety and environmental issues in extracting L-cysteine from animal hair and feathers, the fermentative production of
Daniel Alejandro Caballero Cerbon, Leon Gebhard, Ruveyda Dokuyucu, Theresa Ertl, Sophia Härtl, Ayesha Mazhar, Dirk Weuster-Botz   +6 more
doaj   +2 more sources

Exogenous L-Cysteine and Its Transport Through CtaP Play a Role in Biofilm Formation, Swimming Motility, and Swarming Motility of Listeria monocytogenes [PDF]

Foods
Listeria monocytogenes is of a significant concern for the food industry, largely due to its ability to form biofilms. Flagellar motility and environmental factors are crucial for biofilm formation.
Mahide Muge Yilmaz Topcam, Nattanicha Prayoonwiwat, Carolina Bruschi, Kimon Andreas G. Karatzas   +3 more
doaj   +2 more sources

L-Cysteine-Catalysed Hydration of Activated Alkynes. [PDF]

Angew Chem Int Ed Engl
AbstractHydration reactions consist of the introduction of a molecule of water into a chemical compound and are particularly useful to transform alkynes into carbonyls, which are strategic intermediates in the synthesis of a plethora of compounds. Herein we demonstrate that L–cysteine can catalyse the hydration of activated alkynes in a very effective ...
González-Rodríguez J, González-Granda S, Lavandera I, Gotor-Fernández V, Mangas-Sánchez J.   +4 more
europepmc   +3 more sources

Effect of supplementing L-cysteine and its group analogs on frozen semen quality of bulls: A meta-analysis [PDF]

Veterinary World, 2022
Background and Aim: The quality of frozen bull sperm after thawing is influenced by the primary diluent and antioxidant. This meta-analysis was conducted to determine the effect of supplementing L-cysteine and its group analogs on the quality of frozen ...
Sari Yanti Hayanti, Mohammad Miftakhus Sholikin, Anuraga Jayanegara, Mokhamad Fakhrul Ulum, Marchie Astrid da Costa, Fitriawaty Fitriawaty, Surya Surya, Maureen Chrisye Hadiatry, Santiananda Arta Asmarasari, Eko Handiwirawan, Yenny Nur Anggraeny, Eni Siti Rohaeni, Salfina Nurdin Ahmad, Bustami Bustami, Aryogi Aryogi, Dicky Pamungkas, Yenni Yusriani   +16 more
doaj   +1 more source

Recent Advances, Challenges, and Metabolic Engineering Strategies in L-Cysteine Biosynthesis

Fermentation, 2023
L-Cysteine is a widely used unique sulfur-containing amino acid with wide application in the food, pharmaceutical, and agricultural industries. This paper concludes the advantages and disadvantages of chemical hydrolysis, enzymatic biotransformation, and
Wenwei Li, Zhen Zhou, Dan Wang
doaj   +1 more source

Inhibition of L-Cysteine on the Browning of Fresh Wet Noodles

Foods, 2021
This research explored the effect of L-cysteine on the browning of fresh wet noodles (FWN). With the increasing addition of L-cysteine (0.02–0.1%), the ΔL* decreased and Δa*, Δb* increased. The L-cysteine could reduce the pH value and polyphenol oxidase (
Xin-Ting Wu, Xiao-Na Guo, Ke-Xue Zhu
doaj   +1 more source

Preparation and characterization of soy protein isolate films by pretreatment with cysteine

Food Chemistry: X, 2023
The effect of cysteine concentration on the viscosity of soy protein isolate (SPI)-based film-forming solution (FFS) and physicochemical properties of SPI films was investigated.
Jialin Jiang, Linfan Shi, Zhongyang Ren, Wuyin Weng   +3 more
doaj   +1 more source