l-cysteine,

S-(3-Carboxypropyl)-L-cysteine is a thioether derivative of L-cysteine.

L-Cysteine (L-(+)-Cysteine) is a non-essential sulfur-containing amino acid in humans. L-Cysteine is important for protein synthesis, detoxification, and diverse metabolic functions. Found in beta-keratin, the main protein in nails, skin, and hair, L-Cysteine is important in collagen production, as well as skin elasticity and texture. Also required in the manufacture of amino acid taurine, L-Cysteine is a component of the antioxidant glutathione, and plays a role in the metabolism of essential biochemicals such as coenzyme A, heparin, and biotin.

L-Cysteine hydrochloride (L-Cysteine HCl) is a conditionally essential amino acid,L-Cysteine hydrochloride suppresses ghrelin and reduces appetite in rodents and humans

L-Cysteine methyl ester hydrochloride (L-Cysteine methyl ester hydrochloride (Acdrile)) is an antitussive and an expectorant agent, used to relieve breathing difficulties caused by mucus.

L-Cysteine hydrochloride hydrate (L-Cysteine hydrochloride monohydrate) is a conditionally essential amino acid, which acts as a precursor for biologically active molecules such as hydrogen sulphide (H2S), taurine and glutathione. L-Cysteine hydrochloride hydrate suppresses ghrelin and reduces appetite in rodents and humans.

S-(2-chloro-6-fluorobenzyl)-l-cysteine ,with CAS No. 1241383-43-6, is a fragment molecule that serves as an important scaffold for molecular linking, expansion, and modification. S-(2-chloro-6-fluorobenzyl)-l-cysteine provides a structural basis and research tool for the design and screening of novel drug candidates, and is commonly used in drug discovery, drug synthesis, and related research.

S-(N-PhenethylthiocarbaMoyl)-L-cysteine (PEITC-Cys) is an anticarcinogenic agent that exhibits antileukemic activity by inhibiting DNA synthesis in HL60 cells [1] and acts as an inhibitor of P450 [2].

L-Cysteine S-sulfate sodium salt sesquihydrate is a useful organic compound for research related to life sciences. The catalog number is T64782 and the CAS number is 150465-29-5.

S-(Acetamidomethyl)-N-(tert-butoxycarbonyl)-L-cysteine, catalog number T65253 and CAS number 19746-37-3, is a valuable organic compound for life sciences research.

N-(((9H-Fluoren-9-yl)methoxy)carbonyl)-S-(tert-butylthio)-L-cysteine (catalog number: T66172, CAS: 73724-43-3) is a valuable organic compound utilized in life sciences research.

S-(2-Carboxyethyl)-L-cysteine (S-Carboxyethylcysteine), a modified sulfur amino acid found in Acacia seeds, influences protein utilization and suppresses methionine-induced growth rates in rats, while adversely affecting plasma amino acid concentrations in these animals [1].

S-(N-Methylsulfinylbutylthiocarbamoyl)-L-cysteine (SFN-Cys) is an isothiocyanate derivative, functioning as an active metabolite of sulforaphane, a class I and II histone deacetylase (HDAC) inhibitor, and anticancer agent. This compound is generated from sulforaphane through intermediates - DL-sulforaphane glutathione and sulforaphane cysteinylglycine - via the mercapturic acid pathway enzymes. At a concentration of 20 µM, SFN-Cys diminishes invasion and migration of U87MG and U373 MG glioblastoma cells as observed in wound healing and chamber assays. Furthermore, at 45 µM, it significantly lowers the expression of α-tubulin, βIII-tubulin, stathmin 1, and X-linked inhibitor of apoptosis (XIAP), and also reduces cell density in paclitaxel-resistant A549 lung cancer cells (A549/T). Additionally, when used at 30 µM, SFN-Cys prompts apoptosis and cell cycle arrest at the G2/M phase in U87MG and U373 MG cells.

N-Acetyl-S-(3,4-dihydroxybutyl)-L-cysteine (Dihydroxybutyl mercapturic acid) serves as a biomarker for exposure to 1,3-butadiene. 1,3-Butadiene, a known carcinogen, is commonly found in cigarette smoke and vehicle exhaust.

D/L-Cysteine is a useful organic compound for research related to life sciences. The catalog number is T125019 and the CAS number is 3374-22-9.

DCVC inhibits pathogen-stimulated TNF-α in human extra placental membranes in vitro.Target: TNF-αin vitro: DCVC inhibits pathogen stimulated cytokine release from tissue punch cultures. DCVC (5-50 μM) significantly inhibits LTA-, LPS-, and GBS-stimulated cytokine release from tissue cultures as early as 4 h (P ≤ 0.05). In contrast, TCA (up to 500 μM) does not inhibit LTA-stimulated cytokine release from tissue punches. DCVC effects on LTA-stimulated and LPS-stimulated TNF-α release from tissue punch cultures of extraplacental membranes. DCVC effects on GBS-stimulated release of pro-inflammatory cytokines from extraplacental membranes in transwell cultures. [1]. Boldenow E, et al. The trichloroethylene metabolite S-(1,2-dichlorovinyl)-l-cysteine but not trichloroacetate inhibits pathogen-stimulated TNF-α in human extraplacental membranes in vitro. Reprod Toxicol. 2015 Apr;52:1-6. [2]. Lash LH, et al. Multigenerational study of chemically induced cytotoxicity and proliferation in cultures of human proximal tubular cells. Int J Mol Sci. 2014 Nov 18;15(11):21348-65. [3]. Yoo HS, et al. Comparative analysis of the relationship between trichloroethylene metabolism and tissue-specific toxicity among inbred mouse strains: kidney effects. J Toxicol Environ Health A. 2015;78(1):32-49.

Acetylcysteine (NAC) is an N-acetyl derivative of cysteine, a ROS inhibitor and mucolytic agent. Acetylcysteine induces apoptosis, can be used to reduce mucus thickness, and has anti-influenza viral activity.

Penicillamine (Artamine), possessing antineoplastic properties, induces apoptosis by a p53-mediated mechanism and inhibits angiogenesis by chelating with copper, a cofactor for angiogenesis. Artamine is a beta dimethyl analog of the amino acid cysteine. As a degradation product of penicillin antibiotics, Artamine chelates with heavy metals and increases their urinary excretion.

UCM-1336 (3,3′-(Octylimino)bis[N-phenylpropanamide]) is a potent ICMT inhibitor with an IC50 of 2 μM which is selective against the other enzymes involved in the post-translational modifications of Ras.

S-Sulfo-L-cysteine sodium salt shows a weak affinity for mGluR1α and mGluR5a at high concentrations and has potential antioxidant activity.

S-allyl-L-cysteine (S-Allylcysteine), a natural constituent of fresh garlic, has antioxidant and anticancer properties in animals.

S-trityl-L-Cysteine is a non-natural amino acid and an inhibitor of Eg5, also known as KSP and Kif11, a mitotic kinesin necessary for mitotic spindle formation. S-trityl-L-Cysteine inhibits the ATPase activity of Eg5 in basal and microtubule-stimulated states (IC50s = 1,000 and 140 nM, respectively). It is selective for Eg5 over nine other human kinesins in an enzyme-coupled assay. It reversibly inhibits Eg5-driven microtubule sliding velocity with an IC50 value of 500 nM using X. laevis recombinant Eg5. It induces cell cycle arrest in HeLa cells (IC50 = 700 nM), reversibly halting the cell cycle in the mitotic phase by inhibiting the separation of duplicated chromosomes and preventing bipolar spindle formation. S-trityl-L-Cysteine inhibits the growth of cancer cells in vitro when tested against the National Cancer Institute (NCI) 60 human cancer cell line panel (average GI50 = 1.3 μM) and in mouse xenograft models.

N-Acetyl-L-cysteine ethyl ester (NACET) is a derivative of the amino acid L-cysteine. NACET has been shown to exhibit diverse biochemical and physiological effects, including inhibition of protein synthesis, inhibition of DNA replication, and induction of apoptosis. Additionally, it has demonstrated anti-inflammatory, antioxidant, and anti-cancer activity.

L-Cysteine S-sulfate (S-Sulfo-L-cysteine) is an effective N-methyl-d-aspartate (NMDA) glutamatergic receptors agonist. L-Cysteine S-sulfate is the substrate for cystine lyase [1].

Fmoc-Cys(Acm)-OH (Fmoc-S-acetamidomethyl-L-cysteine) is a cysteine derivative.