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08445

Sigma-Aldrich

7-Amino-4-methyl-3-coumarinylacetic acid

BioReagent, suitable for fluorescence, ~90% (HPLC)

Synonym(s):

2H-1-Benzopyran-3-acetic acid, AMCA-H, Aminomethyl coumarin acetic acid

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About This Item

Empirical Formula (Hill Notation):
C12H11NO4
CAS Number:
106562-32-7
Molecular Weight:
233.22
Beilstein:
7927205
MDL number:
MFCD00081051
UNSPSC Code:
12352106
PubChem Substance ID:
329748585
NACRES:
NA.32

product line

BioReagent

Quality Level

100

Assay

~90% (HPLC)

form

powder

solubility

DMF: soluble
DMSO: soluble
aqueous base: soluble

fluorescence

λex 350 nm; λem 433 nm in methanol

suitability

suitable for fluorescence

SMILES string

CC1=C(CC(O)=O)C(=O)Oc2cc(N)ccc12

InChI

1S/C12H11NO4/c1-6-8-3-2-7(13)4-10(8)17-12(16)9(6)5-11(14)15/h2-4H,5,13H2,1H3,(H,14,15)

InChI key

QEQDLKUMPUDNPG-UHFFFAOYSA-N

Application

AMCA is a useful agent for labeling proteins. Demonstrates a characteristic absorption peak at 345 nm with a fluorescence emission at 440-460 nm (blue region); however, when conjugated with proteins the absorption peak shifts to 355 nm with a fluorescence emission at 440-460 nm. It has a high fluorescence yield with a sufficient Stokes shift (100 nm) and is relatively photostable . Relatively easy to activate and couple to the N-terminal amino group of a peptide resulting in an acid stable amide bond .

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

Other Notes

Useful blue fluorophore for immunofluorescence, λabs ~350 nm, λem ~440 nm

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315,H319,H335

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

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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C Otto et al.
The American journal of physiology, 271(1 Pt 1), C210-C217 (1996-07-01)
Dipeptide uptake was studied in primary cultures from rat anterior pituitaries by use of radiolabeled carnosine and the fluorescent dipeptide derivative beta-Ala-Lys-N epsilon-AMCA (AMCA is 7-amino-4-methylcoumarin-3-acetic acid). Fluorescence microscopic studies revealed that the reporter peptide specifically accumulated in the S-100
Melissa J Leyva et al.
Chemistry & biology, 17(11), 1189-1200 (2010-11-26)
Huntington's Disease (HD) is characterized by a mutation in the huntingtin (Htt) gene encoding an expansion of glutamine repeats on the N terminus of the Htt protein. Numerous studies have identified Htt proteolysis as a critical pathological event in HD postmortem
B Ulfhake et al.
Journal of neuroscience methods, 40(1), 39-48 (1991-11-01)
This paper describes the implementation of an ultraviolet (UV) laser (Spectra Physics 171-18 with 3 lines: 334, 351 and 364 nm in UV) as light source for fluorescence confocal scanning microscopy. With this instrument it is possible to use fluorophores
M W Wessendorf et al.
The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society, 38(1), 87-94 (1990-01-01)
7-Amino-4-methylcoumarin-3-acetic acid (AMCA) has been found to be a useful fluorophore for immunofluorescence. The present study describes a spectrophotometric method for determining the ratio of moles AMCA to moles protein (or the f/p ratio) in an AMCA-conjugated IgG. The concentration
D Delia et al.
Cytometry, 12(6), 537-544 (1991-01-01)
Antibodies coupled to 7-aminocoumarin (AMCA) emit a bright blue fluorescence under ultraviolet (UV) excitation and are therefore ideal for three-color immunofluorescence (IF) with fluorescein (FITC) and phycoerythrin (PE) labeled reagents; however, due to the different absorption spectra, the use of
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