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Avidin from egg white

Name: Avidin from egg white
Brand: SIGMA

recombinant, expressed in corn, ≥12 units/mg protein (E1%/280)

Synonym(s):

AVID_CHICK

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About This Item

CAS Number:

1405-69-2

UNSPSC Code:

12352202

EC Number:

215-783-6

NACRES:

NA.56

MDL number:

MFCD00130572

Form:

powder

Assay:

≥80% protein basis (biuret)

Recombinant:

expressed in corn

Mol wt:

glycoprotein 66 kDa, subunit 16 kDa

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Properties

recombinant

expressed in corn

Quality Segment

200

assay

≥80% protein basis (biuret)

form

powder

specific activity

≥12 units/mg protein (E1%/280)

mol wt

glycoprotein 66 kDa, subunit 16 kDa

technique(s)

ELISA: suitable, immunoblotting: suitable, immunoelectrophoresis: suitable

UniProt accession no.

P02701

storage temp.

2-8°C

Gene Information

chicken ... AVD(396260)

Description

General description

Avidin is a homotetrameric glycoprotein found in the egg white of birds, reptiles and amphibians. Each subunit is 16 kDa, singly glycosylated and binds to a molecule of biotin with greater affinity and specificity. Recombinant avidin from corn is similar to avidin from egg white in terms of properties like isoelectric point (pI) and antigenic properties except for the molecular weight. Avidin from corn has low molecular weight than chicken egg-derived avidin. This might be due to less complex glycosylation composition in plants. Commercial production of avidin from corn has certain advantages in terms of availability of greater biomass and avoiding the co-purification of animal virus.

Application

Avidin forms an extremely strong complex with d-biotin (K_d ~ 10^-15). This activity has made both avidin and biotin extremely useful labels in immunochemical methods of detection and quantitation.

Avidin egg white was used in an assay using functionalized xenon as a biosensor to detect biotin-avidin binding. Egg white was used at 80 nmol.

Preparation Note

Affinity purified

Other Notes

One unit will bind 1.0 μg of d-biotin.

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This Item	A2050	A9275	189725
Sigma-Aldrich A8706 Avidin from egg white	Sigma-Aldrich A2050 Avidin–FITC from egg white	Sigma-Aldrich A9275 Avidin from egg white	Sigma-Aldrich 189725 Avidin, Egg White
description recombinant, expressed in corn, ≥12 units/mg protein (E1%/280)	description buffered aqueous solution	description BioUltra, lyophilized powder, ≥10 units/mg protein (E1%/280), ≥98% (SDS-PAGE)	description -
recombinant expressed in corn	recombinant -	recombinant -	recombinant -
technique(s) immunoelectrophoresis: suitable, immunoblotting: suitable, ELISA: suitable	technique(s) immunohistochemistry (formalin-fixed, paraffin-embedded sections): 20-40 μg/mL, indirect immunofluorescence: 1:200	technique(s) -	technique(s) -
assay ≥80% protein basis (biuret)	assay -	assay ≥98% (SDS-PAGE)	assay -
form powder	form buffered aqueous solution	form lyophilized powder	form lyophilized solid
mol wt subunit 16 kDa, glycoprotein 66 kDa	mol wt -	mol wt subunit 16 kDa, glycoprotein 66 kDa	mol wt -
Gene Information chicken ... AVD(396260)	Gene Information chicken ... AVD(396260)	Gene Information -	Gene Information -

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Storage Class

11 - Combustible Solids

Flash Point (°F)

Not applicable

Flash Point (°C)

Not applicable

PPE (personal protective equipment)

Eyeshields, Gloves, type N95 (US)

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