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Merck

A2929

Sigma-Aldrich

Agarosa

For pulsed field electrophoresis running gel

Sinónimos:

3,6-Anhydro-α-L-galacto-β-D-galactan

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About This Item

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

biological source

algae (red)

form

powder

technique(s)

electrophoresis: suitable

impurities

≤10% water

EEO

≤0.10

transition temp

gel point 38-43 °C (10% gel)

gel strength

≥2000 g/cm2

anion traces

sulfate (SO42-): ≤0.20%

foreign activity

DNase, RNase, NICKase, none detected

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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Specificity

Suitable for the separation of high molecular weight DNA. Gels are easy to handle and give faster separation and better resolution of high molecular weight DNA by field inversion electrophoresis than our routine-use agarose.

Application

Especially formulated for fast resolution of large DNA (10-2000 ·kb) by pulsed-field gel electrophoresis (PFGE) or conventional electrophoresis. Pulsed-field gel electrophoresis was developed in 1984 to deal with "reptation" of large DNA′s whose size surpass the limit of resolution and all migrate at the same rate. Alternately pulsed, orthogonally oriented electric fields are applied across the gel. Every time the direction of the electric field changes, the large DNA′s can no longer migrate until they become reoriented along the new electric field. The time required for reorientation is dependent on the size of the DNA, therefore the DNA is fractionated by size.

Features and Benefits

  • Low EEO allows for increased voltages and more rapid DNA migration
  • Greater gel strength allows for stability of lower concentration gels leading to faster DNA migration
  • Gels exhibit low background fluorescence using ethidium bromide staining

Analysis Note

A continuación se presenta una lista de las propiedades asociadas a nuestras agarosas:
Contenido de sulfatos - utilizados como un indicador de pureza, ya que los sulfatos constituyen el principal grupo iónico presente.
Fuerza del gel - la fuerza que debe aplicarse a un gel para provocar su fractura.
Punto de gelificación - la temperatura a la cual una disolución acuosa de agarosa forma un gel cuando se enfría. Las disoluciones de agarosa exhiben histéresis en la transición de líquido a gel - es decir, su punto de gelificación no es el mismo que su temperatura de fusión.
Electroendosmosis (EEO) - movimiento de líquido a través del gel. En un gel de agarosa, los grupos aniónicos están pegados a la matriz y no pueden moverse, pero los contra-cationes disociables pueden migrar en la matriz hacia el cátodo, dando lugar a EEO. Dado que el movimiento electroforético de los biopolímeros suele ser en dirección al ánodo, la EEO puede alterar las separaciones debido a la convección interna.

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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