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L cysteine l cys

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L-cysteine (L-Cys) is a non-essential amino acid that plays a crucial role in various biological processes. It is a sulfur-containing amino acid that serves as a building block for proteins and is involved in the synthesis of other important compounds, such as glutathione. L-Cys is commonly used in laboratory settings for research and analysis purposes.

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6 protocols using l cysteine l cys

1

MMP-7 and MMP-2 Activity Assay

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Active matrix metalloproteinase-7 (MMP-7) and matrix metalloproteinase-2 (MMP-2) were purchased from Merck Millipore (Darmstadt, Germany). Coelenterazine-h was from Nanolight Technologies (Pinetop, AZ, USA). Ni(II)-nitrilotriacetic acid (Ni-NTA) resin and NA-coated white 96-well plate were from Thermo Fisher Scientific Inc. (Waltham, MA, USA). L-arabinose, 2-mercaptoethane-sulfonic acid (MESA), and L-Cysteine (L-Cys) were from Sigma-Aldrich (Yongin, Korea). Cys-Lys-Biotin (CK-Biotin) was synthesized by Peptron Inc. (Daejeon, Korea). RIPA buffer was purchased from Cell Signaling Technology (Danvers, MA, USA).
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2

Electrochemical Biosensor for Glucose and Interferents

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Pyrrole above 99% purity was obtained from Daejung-Korea. MWCNTs (Ca. ~10 nm in external diameter) synthesized via chemical vapor deposition (CVD) were purchased from Nanosolutions Co. Ltd., Korea. Glucose oxidase (GOx, EC 1.1.3.4, Type X-S 127 unit/mg) lyophilized powder, from Aspergillus niger, human blood serum (H4522), Nafion (Nf, 5 wt. % in lower aliphatic alcohol), L-cysteine (L-cys), and cholesterol were purchased from Sigma-Aldrich, Korea. β-D-Glucose and ascorbic acid (AA) were purchased from Tokyo Chemical Industry Co., Ltd. Dopamine (DA) and uric acid (UA) were obtained from Bioshop Canada Inc. Disodium hydrogen phosphate (Na2HPO4), monobasic potassium phosphate (KH2PO4), sodium chloride (NaCl), potassium chloride (KCl), sulphuric acid (H2SO4), nitric acid (HNO3), and acetonitrile (CH3CN) were obtained from Samchun Pure Co. Ltd., Korea. Phosphate buffer solution (PBS, 0.1 M, pH 7.4) was prepared in ultra-pure water purified by Millipore-Q system (18 MΩ cm). All chemicals and reagents were of analytical grade and were used as received without further purification.
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3

Cysteine and Porphyrin Derivative Characterization

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L-cysteine (L-Cys), D-cysteine (D-Cys), and TMPyP4 (5, 10, 15, 20-Tetrakis (1-methyl-4-pyridinio) porphyrin tetra (p-toluenesulfonate) were purchased from Sigma-Aldrich (Shanghai, China). NaOH was obtained from Sinopharm Chemical Reagent Company (Shanghai, China). H2TPPS Hydrate (=Tetraphenyl porphyrin Tetrasulfonic Acid Hydrate) Ultra-high sensitive spectrophotometric reagent for transition metals were bought from Tokyo Chemical Industry (Shanghai, China). Dialysis tubes with molecular weight cut-off 1 KDa were obtained from Sangon Biotech (Shanghai, China). All the chemicals were analytical grade and used without further treatment. All solutions were prepared using ultrapure water (18.2 MΩ·cm) from a Milli-Q automatic ultrapure water system.
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4

Reagents for Cell Culture Experiments

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Minimum essential medium (MEM), fetal bovine serum (FBS), penicillin/streptomycin, Hanks Balanced Salt Solution, sodium pyruvate and trypsin were purchased from Gibco (Carlsbad, CA, United States). 5-Alpha-dihydrotestosterone (5α-DHT), collagenase IA, pyridoxal 5-phosphate, O-(carboxymethyl) hydroxylamine hemihydrochloride chloride (AOAA), DL-propargylglycine (PAG), sodium hydrosulfide hydrate (NaHS × H2O), sodium lactate, L-cysteine (L-Cys), bumetanide, 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES), glibenclamide (Glib), Iberiotoxin (IbTx) and tetraethylammonium chloride (TEA) were purchased from Sigma-Aldrich (St. Louis, MO, United States). HC067047 was purchased from Tocris (Bristol, United Kingdom). NaCl, KCl, MgSO4, FeCl3, HCl, BaCl2, NaHCO3, KH2PO4, CaCl2, glucose, mannitol, lactic acid, normal saline, N,N-dimethyl-p-phenylenediamine sulfate, trichloroacetic acid, and zinc acetate were purchased from Guangzhou Chemical Pharmaceutical Factory (Guangzhou, China). Universal two-step detection kit (PV-9000) and DAB detection kit were purchased from ZSBIO (Beijing, China). Fluo-3 AM was purchased from Molecular Probes (Eugene, OR, United States). PBFI AM was purchased from Cayman Chemical (Ann Arbor, MI, United States).
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5

Investigating Neuroinflammation Modulators

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L-Cysteine (L-Cys), aminooxyacetic acid (AOAA, CBS inhibitor), DL-propargylglycine (PAG, CSE inhibitor), lipopolysaccharide (LPS), and MCC950 (NLRP3 inflammasome inhibitor) were purchased from Sigma-Aldrich (St. Louis, MO). Control liposomes and clodronate liposomes were purchased from FormuMax (Silicon Valley, CA). Deoxyribonuclease Ⅰ was purchased from Beijing Solarbio Science and Technology Co. (Beijing, China). 2-Deoxy-D-glucose was purchased from J&K Scientific (Beijing, China). Armenian Hamster IgG Isotype Control and IL-1 beta Monoclonal Antibody were purchased from Invitrogen Life Technology (Foster City, CA). Antibodies for βⅢ-tubulin, Nestin, and IL-1β were purchased from Abcam (Cambridge, United Kingdom). Antibodies for cleaved caspase-1 and NLRP3 were purchased from Cell Signaling Technology (Danvers, MA). Monoclonal mouse anti-β-actin was purchased from Zhongshan Golden Bridge Biotechnology (Beijing, China). The secondary antibodies were purchased from Abcam (Cambridge, United Kingdom), Invitrogen Life Technology (Foster City, CA), and Zhongshan Golden Bridge Biotechnology (Beijing, China). Mouse ELISA kits were purchased from Dakewe Biotech (Shenzhen, China) and Boster Biological Technology (Wuhan, China). Dulbecco’s modified Eagle’s medium (DMEM), 10% heat-inactivated FBS, and 1% penicillin–streptomycin solutions were purchased from Gibco (Foster City, CA).
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6

Synthesis of Luminescent Nanomaterials

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Yttrium(III) acetate hydrate (99.9%), ytterbium(III) acetate hydrate (99.9%), erbium(III) acetate hydrate (99.9%), neodymium(III) acetate hydrate (99.9%), ammonium fluoride (NH4F, 98+%), 1-octadecene (ODE, 90%), oleic acid (OA, 90%), epirubicin hydrochloride (EPI, 90+%), and L-cysteine (L-Cys, 97%) were purchased from Sigma-Aldrich. Histidine (His, 99%) and glucose (Glu, 99%) were bought from Macklin. Phosphate buffered saline (PBS) was obtained from HyClone. Hydrogen chloride (HCl), sodium hydroxide (NaOH), potassium chloride (KCl), sodium chlorate (NaCl), calcium chloride (CaCl2,) magnesium chloride (MgCl2), aluminum chloride (AlCl3), and L-glycine (L-Gly) were supplied from the China National Pharmaceutical Group Corporation. Cyanidin 3-glucoside, doxorubicin, and daunorubicin were purchased from Shanghai yuanye Bio-Technology company. All chemicals and reagents were analytically pure and used without any further purification.
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