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I1149

Sigma-Aldrich

Iodoacetamide

BioUltra

Synonym(s):

2-Iodoacetamide, Monoiodoacetamide, alpha-Iodoacetamide

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About This Item

Linear Formula:
ICH2CONH2
CAS Number:
Molecular Weight:
184.96
Beilstein:
1739080
EC Number:
MDL number:
UNSPSC Code:
12352202
PubChem Substance ID:
NACRES:
NA.77

biological source

synthetic (organic)

Quality Level

product line

BioUltra

Assay

≥99% (NMR)

form

powder

impurities

≤0.0005% Phosphorus (P)
≤0.1% Insoluble matter

mp

92-95 °C (lit.)

solubility

H2O: 0.5 M, clear, colorless

anion traces

chloride (Cl-): ≤0.05%
sulfate (SO42-): ≤0.05%

cation traces

Al: ≤0.0005%
Ca: ≤0.0005%
Cu: ≤0.0005%
Fe: ≤0.0005%
K: ≤0.005%
Mg: ≤0.0005%
NH4+: ≤0.05%
Na: ≤0.05%
Pb: ≤0.001%
Zn: ≤0.0005%

storage temp.

2-8°C

SMILES string

NC(=O)CI

InChI

1S/C2H4INO/c3-1-2(4)5/h1H2,(H2,4,5)

InChI key

PGLTVOMIXTUURA-UHFFFAOYSA-N

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Application

Iodoacetamide has been used:
  • in protein digestion for proteomic analysis
  • to alkylate protein samples
  • in the denaturation of cow′s milk allergens, β-lactoglobulin (BLG) and α-lactalbumin (ALA)

Biochem/physiol Actions

Iodoacetamide (IAA) is used to inhibit glycolysis due to its ability to irreversibly inhibit the glycolytic enzyme glyceraldehyde-3-phosphate dehydrogenase (GAPDH). IAA is used to investigate the role of cysteine residues in enzyme catalysis and the brain cell transport process. It can react with low molecular weight thiol compounds like mercaptoethanol and glutathione. IAN may also block enzymes like bromelain, cathepsin C, clostripain, and carboxypeptidase P.
Iodoacetamide acts as an alkylating reagent for cysteine residues in peptide sequencing. It is an irreversible inhibitor of enzymes with cysteine at the active site. It reacts much more slowly with histidine residues, but that activity is responsible for inhibiting ribonuclease.

Pictograms

Skull and crossbonesHealth hazard

Signal Word

Danger

Hazard Statements

Hazard Classifications

Acute Tox. 3 Oral - Aquatic Chronic 4 - Resp. Sens. 1 - Skin Sens. 1

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Mirko Zaffagnini et al.
Antioxidants & redox signaling, 16(1), 17-32 (2011-06-29)
Cysteines (Cys) made acidic by the protein environment are generally sensitive to pro-oxidant molecules. Glutathionylation is a post-translational modification that can occur by spontaneous reaction of reduced glutathione (GSH) with oxidized Cys as sulfenic acids (-SOH). The reverse reaction (deglutathionylation)
Tommy Weiss-Sadan et al.
Theranostics, 9(20), 5731-5738 (2019-09-20)
Despite the common use of lipid-lowering medications, cardiovascular diseases continue to be a significant health concern. Atherosclerosis, one of the most frequent causes of cardiovascular morbidity, involves extensive inflammatory activity and remodeling of the vascular endothelium. This relentless inflammatory condition
Konstantinos Boulias et al.
Molecular cell, 75(3), 631-643 (2019-07-08)
mRNAs are regulated by nucleotide modifications that influence their cellular fate. Two of the most abundant modified nucleotides are N6-methyladenosine (m6A), found within mRNAs, and N6,2'-O-dimethyladenosine (m6Am), which is found at the first transcribed nucleotide. Distinguishing these modifications in mapping
Valentina R Minciacchi et al.
Oncotarget, 6(13), 11327-11341 (2015-04-11)
Large oncosomes (LO) are atypically large (1-10 µm diameter) cancer-derived extracellular vesicles (EVs), originating from the shedding of membrane blebs and associated with advanced disease. We report that 25% of the proteins, identified by a quantitative proteomics analysis, are differentially
Elena B Lugli et al.
Arthritis research & therapy, 17, 9-9 (2015-01-21)
Smoking is a well-established risk factor for rheumatoid arthritis (RA), and it has been proposed that smoking-induced citrullination renders autoantigens immunogenic. To investigate this mechanism, we examined human lung tissue from 40 subjects with defined smoking status, with or without

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