Definition of Molecular weight ladder

Molecular weight size marker (ladder) is also referred to as a protein, DNA or RNA ladder. These ladders are a set of standards that are used to identify the approximate size of a molecule run on either an agarose or polyacrylamide gel during electrophoresis. The approximate size calculation is based on the principle that molecular weight is inversely proportional to the migration rate of the molecule through a gel.

2D gels

Agarose gel

Bioluminescence

Camera lens focal lengths

CCD camera

Chemiluminescence

Cloning

Colony counting

Colorimetric blots

DGGE

DIGE 2D gels

DNA

F-Stop

Film

Fluorescence

Fluorophore

Gel documentation

Gel electrophoresis

Gel imaging

GFP plant imaging

In-cell western

In-Gel western

In-vivo imaging

Infra-red imaging

Lens

Membrane

Molecular weight ladder

Multiplexed western blot

Nitrocellulose membranes

PCR

Polyacrylamide gel

Proteins

PVDF membranes

Safe dye imaging

Signal to noise ratio

TGX Stain-free™ gels

Thin Layer chromatography (TLC)

UV shadowing

Western blotting