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53608

Sigma-Aldrich

Biotin (5-fluorescein) conjugate

BioReagent, suitable for fluorescence, ≥90% (HPCE)

Synonym(s):

N-(Biotinylamidoethyl)-fluorescein-5-carboxamide, N-(Fluorescein-5-carbamidoethyl)biotinamide

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About This Item

Empirical Formula (Hill Notation):
C33H32N4O8S
CAS Number:
957494-27-8
Molecular Weight:
644.69
MDL number:
MFCD03791084
UNSPSC Code:
12352108
eCl@ss:
34058011
PubChem Substance ID:
57651424
NACRES:
NA.32

product line

BioReagent

Assay

≥90% (HPCE)

solubility

DMSO: soluble

fluorescence

λex 490 nm; λem 524 nm in 0.1 M Tris pH 8.0

suitability

suitable for fluorescence

storage temp.

−20°C

SMILES string

[H][C@]12CS[C@@H](CCCCC(=O)NCCNC(=O)c3ccc(c(c3)C(O)=O)C4=C5C=CC(=O)C=C5Oc6cc(O)ccc46)[C@@]1([H])NC(=O)N2

InChI

1S/C33H32N4O8S/c38-18-6-9-21-25(14-18)45-26-15-19(39)7-10-22(26)29(21)20-8-5-17(13-23(20)32(42)43)31(41)35-12-11-34-28(40)4-2-1-3-27-30-24(16-46-27)36-33(44)37-30/h5-10,13-15,24,27,30,38H,1-4,11-12,16H2,(H,34,40)(H,35,41)(H,42,43)(H2,36,37,44)/t24-,27-,30-/m0/s1

InChI key

DFUFXKZUEOKPSD-LFERIPGTSA-N

Application

Biotin (5-fluorescein) conjugate is a reagent that may be used in situations similar to fluorescein isothiocyanate staining to label avidin/streptavidin conjugated molecules such as antibodies with the fluorophore 5-fluorescein.

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

Other Notes

Biotin-fluorescein conjugate for the fluorometric, accurate measurement of avidin and streptavidin.
Often referred to as Biotin (4-fluorescein) conjugate.

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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Microglia respond in a stereotypical pattern to a diverse array of pathological states. These changes are coupled to morphological and immunophenotypical alterations and the release of a variety of reactive species, trophic factors and cytokines that modify both microglia and
H J Gruber et al.
Biochimica et biophysica acta, 1381(2), 203-212 (1998-08-01)
A new fluorimetric assay is presented for the specific and reliable quantitation of >/=2 nM avidin and streptavidin. The assay is based on pronounced changes in the fluorescence properties of commercial fluorescein-biotin, or of a newly synthesized biotin-poly(ethylene glycol)-pyrene conjugate
G. Kada et al.
Biochimica et Biophysica Acta, 1427, 33-33 (1998)
Ann L Baldwin et al.
Journal of the American Association for Laboratory Animal Science : JAALAS, 46(1), 58-65 (2007-01-06)
Housing rats in an environment with high personnel activity increases microvascular leakiness to albumin in the mesenteric microcirculation and causes mast cell degranulation. In this study, rats were exposed to daily 15-min episodes of 90-dB SPL noise to determine whether

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