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Merck
CN

A8706

Avidin from egg white

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

Synonym(s):

AVID_CHICK

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About This Item

CAS Number:
UNSPSC Code:
12352202
EC Number:
215-783-6
NACRES:
NA.56
MDL number:
Form:
powder
Assay:
≥80% protein basis (biuret)
Recombinant:
expressed in corn
Mol wt:
glycoprotein 66 kDa, subunit 16 kDa
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recombinant

expressed in corn

Quality Level

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.

storage temp.

2-8°C

Gene Information

chicken ... AVD(396260)

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

Preparation Note

Affinity purified

Other Notes

One unit will bind 1.0 μg of d-biotin.


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Storage Class

11 - Combustible Solids

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)



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Timothy R J Holford et al.
Biosensors & bioelectronics, 44, 198-203 (2013-02-23)
We describe within this paper the construction of a label-free immunosensor for the protein psoriasin (S100A7), which is associated with a number of clinical conditions such as skin diseases or cancer. Antibodies to psoriasin were immobilised onto screen-printed carbon electrodes
M J Navakouskiĭ et al.
Bioorganicheskaia khimiia, 38(4), 449-457 (2012-11-30)
A new construction of a test-system for free thyroid hormone 3,3',5-triiodothyronine determination (free T3) in human blood serum in ELISA and IRMA variants was described. For this purpose a low-molecular weight bifunctional conjugate containing T3 and vitamin H (biotin, Bt)
Sofia H L Frost et al.
Cancer biotherapy & radiopharmaceuticals, 28(2), 108-114 (2012-12-13)
Abstract Purpose: Pretargeted radioimmunotherapy (PRIT) against intraperitoneal (i.p.) ovarian microtumors using avidin-conjugated monoclonal antibody MX35 (avidin-MX35) and (211)At-labeled, biotinylated, succinylated poly-l-lysine ((211)At-B-PLsuc) was compared with conventional radioimmunotherapy (RIT) using (211)At-labeled MX35 in a nude mouse model. Mice were inoculated i.p.



Global Trade Item Number

SKUGTIN
A8706-5MG04061833400562