Skip to Content
Merck
All Photos(1)

Key Documents

View All Documentation

D3812

Sigma-Aldrich

DirectLoad™ 50 bp DNA Step Ladder

ready-to-use marker for DNA electrophoresis

Synonym(s):

DirectLoad™ 50 bp DNA Marker, Ready-to-use 50 bp DNA Marker, Ready-to-use DirectLoad™ 50 bp DNA Marker, Ready-to-use DirectLoad™ 50 bp DNA Step Ladder

Sign Into View Organizational & Contract Pricing
All Photos(1)

About This Item

UNSPSC Code:
41105335
NACRES:
NA.25

Quality Level

200

form

(liquid)

usage

sufficient for 100 loads

suitability

suitable for electrophoresis (DNA)

storage temp.

−20°C

General description

Sigma′s DirectLoad™ 50 bp DNA Step Ladder contains 17 blunt-ended fragments consisting of 50 bp repeats from 50 to 500 bp, 100 bp repeats from 600 to 900 bp, and 1 kb repeats from 1 to 3 kb. Ten ul of the ladder can be loaded directly in a single lane on an agarose or polyacrylamide gel.

Application

DirectLoad™ 50 bp DNA Step Ladder has been used for cell lysis and genomic cleavage detection assay.
Suitable for size determination of PCR-generated DNA fragments with either agarose or polyacrylamide gels.

Features and Benefits

  • Ready-to-load
  • Easy-to-use
  • Popular band sizes

Components

Sigma′s DirectLoad™ 50 bp DNA Step Ladder is provided in a gel-loading solution of 5% glycerol, 4.2 mM EDTA, 0.083% orange G and 0.0125% xylene cyanol.

Other Notes

For optimal resolution, the recommended agarose gel concentration is 2.0%.

Legal Information

DirectLoad is a trademark of Sigma-Aldrich Co. LLC

Storage Class Code

10 - Combustible liquids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Solid-phase reverse transfection for intracellular delivery of functionally active proteins
Bulkescher R, et al.
Genome Research, 27(10), 1752-1758 (2017)
Cinzia Fabbro et al.
FEMS microbiology letters, 307(2), 158-164 (2010-04-24)
Culturable vibrios were isolated from seawater collected during an annual sampling study performed along the Gulf of Trieste coast (Northern Adriatic Sea), and conventional culturing and identification methods were used to investigate the presence of Vibrio parahaemolyticus. Biochemically selected Vibrio

Articles

Markers and Ladders for Gel Electrophoresis

We offers a variety of markers that aid size determination of samples separated by agarose and/or polyacrylamide gel electrophoresis. These products include markers for DNA, PCR fragments and RNA and can be concurrently run with the samples. All the markers stain well with common nucleic acid stains.

Protocols

Antibody-Enzyme Mediated Hot Start PCR Protocol

When using hot start Taq DNA polymerase, the enzyme remains inactive until heated. Hot Start DNA polymerase control is achieved by chemical or antibody modification of the enzyme.

End-Point PCR: Antibody-Mediated Hot Start PCR Protocol with Enhanced Specificity and Yield

Protocol using antibody mediated hot start polymerase. Method has short activation period (<1min), and results in higher yields and more specificity over standard PCR methods.

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service