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Key Documents

A4679

Sigma-Aldrich

Agarose

Low EEO, for Immunoelectrophoresis

Synonym(s):

3,6-Anhydro-α-L-galacto-β-D-galactan, Agarose LE

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About This Item

CAS Number:
EC Number:
MDL number:
UNSPSC Code:
41105317
PubChem Substance ID:
NACRES:
NA.25

biological source

algae (Gelidium)

Quality Level

form

powder

technique(s)

electrophoresis: suitable
immunodiffusion: suitable
immunoelectrophoresis: suitable

impurities

≤7% water

EEO

0.09-0.13

mp

88 °C±2 °C (1.5% gel)

transition temp

gel point 34-38 °C (1.5% gel)

gel strength

≥1200 g/cm2 (1% gel)

anion traces

sulfate (SO42-): ≤0.20%

InChI

1S/C24H38O19/c25-1-5-9(27)11(29)12(30)22(38-5)41-17-8-4-36-20(17)15(33)24(40-8)43-18-10(28)6(2-26)39-23(14(18)32)42-16-7-3-35-19(16)13(31)21(34)37-7/h5-34H,1-4H2/t5-,6-,7+,8+,9+,10+,11+,12-,13+,14-,15+,16-,17-,18+,19+,20+,21-,22+,23+,24+/m1/s1

InChI key

MJQHZNBUODTQTK-WKGBVCLCSA-N

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General description

Agarose contains β-D-galactose and 3,6-anhydro-α-L-galactose, linked by glycosidic bonds β(1-4).

Application

Agarose is the most popular medium for immunoelectrophoresis because of the large pore size for rapid diffusion and for low background staining by Coomassie Blue G stain. The low EEO and high gel strength is specifically selected and tested for immunoelectrophoresis and immunodiffusion.

Preparation Note

Gel Preparation:
1. Prepare a 1% agarose solution (sufficient for 10 gels 85 mm x 100 mm, 1-1.5 mm thick) by mixing 1.5 g agarose (Catalog No. A4679) in 150 mL of prepared barbital buffer and heat in a boiling water bath until completely dissolved.
2. To prepare one gel, pour 14 mL of agarose solution onto the hydrophilic side of a level, well supported 85 mm x 100 mm sheet of Electrophoresis Film for Agarose Gels (Catalog No. E0264). Pour from the center of the sheet toward its edges forming an even layer of agarose 1-1.5 mm thick.
3. Allow the gels to harden for one hour at 4 °C before using or store at 0-5 °C in an appropriate, plastic wrapped container.

Analysis Note

The following is a list of properties associated with our agaroses:
Sulfate content - used as an indicator of purity, since sulfate is the major ionic group present.
Gel strength - the force that must be applied to a gel to cause it to fracture.
Gel point - the temperature at which an aqueous agarose solution forms a gel as it cools. Agarose solutions exhibit hysteresis in the liquid-to-gel transition - that is, their gel point is not the same as their melting temperature.
Electroendosmosis (EEO) - a movement of liquid through the gel. Anionic groups in an agarose gel are affixed to the matrix and cannot move, but dissociable counter cations can migrate toward the cathode in the matrix, giving rise to EEO. Since electrophoretic movement of biopolymers is usually toward the anode, EEO can disrupt separations because of internal convection.

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)


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Agarose and its derivatives as supports for enzyme immobilization
Zucca P, et al.
Molecules (Basel), 21(11), 1577-1577 (2016)
Gianluca Vadalà et al.
Spine, 38(6), E319-E324 (2013-01-18)
Descriptive anatomical study on ovine and human cadaveric lumbar spinal segments. To describe the alternative transpedicular approach to deliver therapeutic agents into intervertebral disc (IVD). The present delivery approach of therapeutic agents (growth factors/cells/hydrogels) within the IVD is through injection
Jia Liu et al.
Proceedings of the National Academy of Sciences of the United States of America, 110(17), 6694-6699 (2013-04-10)
Seamless and minimally invasive integration of 3D electronic circuitry within host materials could enable the development of materials systems that are self-monitoring and allow for communication with external environments. Here, we report a general strategy for preparing ordered 3D interconnected
Nathan A Baird et al.
PloS one, 3(10), e3376-e3376 (2008-10-15)
Single nucleotide polymorphism (SNP) discovery and genotyping are essential to genetic mapping. There remains a need for a simple, inexpensive platform that allows high-density SNP discovery and genotyping in large populations. Here we describe the sequencing of restriction-site associated DNA
Michael J Lafferty et al.
The Journal of biological chemistry, 288(40), 28524-28534 (2013-08-21)
Elevated triglycerides are associated with an increased risk of cardiovascular disease, and lipoprotein lipase (LPL) is the rate-limiting enzyme for the hydrolysis of triglycerides from circulating lipoproteins. The N-terminal domain of angiopoietin-like protein 4 (ANGPTL4) inhibits LPL activity. ANGPTL4 was

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