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Sigma-Aldrich

5-Maleimido-eosin

for fluorescence, ≥93% (HPLC)

Synonyme(s) :

EMA, Eosin-5-maleimide

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About This Item

Formule empirique (notation de Hill):
C24H9Br4NO7
Numéro CAS:
150322-02-4
Poids moléculaire :
742.95
Numéro MDL:
MFCD07437936
Code UNSPSC :
12352207
ID de substance PubChem :
329759808
Nomenclature NACRES :
NA.32

Qualité

for fluorescence

Niveau de qualité

100

Pureté

≥93% (HPLC)

Fluorescence

λex 524 nm; λem 545 nm (after derivatization with 2-mercaptoethanol)

Température de stockage

2-8°C

Chaîne SMILES 

Oc1c(Br)cc2c(Oc3c(Br)c(O)c(Br)cc3C24OC(=O)c5cc(ccc45)N6C(=O)C=CC6=O)c1Br

InChI

1S/C24H9Br4NO7/c25-13-6-11-21(17(27)19(13)32)35-22-12(7-14(26)20(33)18(22)28)24(11)10-2-1-8(5-9(10)23(34)36-24)29-15(30)3-4-16(29)31/h1-7,32-33H

Clé InChI

YRCLWXRIEYQTAV-UHFFFAOYSA-N

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Description générale

5-Maleimido-eosin, also known as EMA or Eosin-5-maleimide, is a fluorescent binding agent. The 5-Maleimido-eosin binding test measures the EMA-labeled cells reduced mean channel fluorescence (MCF) reading.

Application

Eosin-5-maleimide has been used as a fluorescent probe for the human erythrocyte band 3 protein. It is widely used as a diagnostic probe for the laboratory detection of hereditary spherocytosis (HS) by flow cytometry. The eosin-5-maleimide binding test was done to analyze the effect of alectinib (first line of treatment) for anaplastic lymphoma kinase (ALK).

Autres remarques

Triplet probe. Measurement of rotational diffusion of protein in solution and in membranes, including myosin and pyruvate dehydrogenase

Produit(s) apparenté(s)

Réf. du produit
Description
Tarif

08168

Timestrip Plus™ 8 °C

Code de la classe de stockage

11 - Combustible Solids

Classe de danger pour l'eau (WGK)

WGK 3

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable

Équipement de protection individuelle

Eyeshields, Gloves, type N95 (US)

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Certificats d'analyse (COA)

Lot/Batch Number
BCCG9639
BCCF3538
BCCD3360
BCCB9833
BCBZ9994

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Consulter la Bibliothèque de documents

S Ishiwata et al.
The Journal of biological chemistry, 262(17), 8314-8317 (1987-06-15)
We studied the rotational Brownian motions of myosin heads, of which the sulfhydryl group was selectively labeled with the triplet probe 5-eosinylmaleimide, in myofibril by using flash-induced phosphorescence anisotropy decay measurements. The anisotropy decay curve under relaxing conditions consisted of
Renée L Crisp et al.
Pediatric blood & cancer, 59(7), 1299-1301 (2012-04-11)
We studied 31 children with hemolytic anemia, or with positive family history for hereditary spherocytosis (HS), to assess the reliability of capillary blood samples for the diagnosis. HS was diagnosed in 20 patients. Cryohemolysis (CH) was positive in 94% and
Delay in the measurement of eosin-5'-maleimide (EMA) binding does not affect the test result for the diagnosis of hereditary spherocytosis.
Ciepiela O, Kotula I, Gorska E, et al.
Clinical Chemistry and Laboratory Medicine, 0, 1-7 (2012)
Paola Bianchi et al.
Haematologica, 97(4), 516-523 (2011-11-08)
The laboratory diagnosis of hereditary spherocytosis commonly relies on NaCl-based or glycerol-based red cell osmotic fragility tests; more recently, an assay directly targeting the hereditary spherocytosis molecular defect (eosin-5'-maleimide-binding test) has been proposed. None of the available tests identifies all
A J Visser et al.
European journal of biochemistry, 121(1), 233-235 (1981-12-01)
The enzymatically reduced lipoyl residues of the transacetylase component of the pyruvate dehydrogenase complex from Escherichia coli were labeled with eosin maleimide. Using eosin as triplet probe, triplet-triplet absorption dichroism measurements were performed to obtain rotational correlation times of the
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