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
Stain Free Gels
TGX Stain-free™ gels
Thin Layer chromatography (TLC)
UV shadowing
Western blotting
Glossary definition of
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.