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S3401

Sigma-Aldrich

Sample Buffer, Laemmli 2× Concentrate

Synonym(s):
SDS Sample Buffer
NACRES:
NA.25

Quality Level

packaging

vial of 6 mL

storage temp.

−20°C

Application

Sample Buffer, Laemmli 2× concentrate has been used as a sample buffer for denaturing and loading of protein samples in SDS-PAGE.

Biochem/physiol Actions

Laemmli sample buffer is especially formulated for protein sample preparation to be used in the Laemmli SDS-PAGE system. A protein sample is mixed with the 2X sample buffer (1:1) and heated in boiling water for 2-5 min. The 2-mercaptoethanol reduces the intra and inter-molecular disulfide bonds. The SDS detergent denatures the proteins and subunits and gives each an overall negative charge so that each will separate based on size. The bromophenol blue serves as a dye front that runs ahead of the proteins and also serves to make it easier to see the sample during loading. The glycerol increases the density of the sample so that it will layer in the sample well.

Other Notes

Solution contains 4% SDS, 20% glycerol, 10% 2-mercaptoethanol, 0.004% bromphenol blue and 0.125 M Tris HCl, pH approx. 6.8.

Quantity

Recommended usage: add 1 volume gel loading solution to 1 volume sample and mix well.

Signal Word

Danger

Hazard Classifications

Acute Tox. 3 Dermal - Acute Tox. 4 Oral - Aquatic Chronic 3 - Eye Dam. 1 - Repr. 2 - Skin Irrit. 2 - Skin Sens. 1 - STOT RE 2 Oral

Storage Class Code

6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK Germany

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Certificate of Analysis

Certificate of Origin

Amanda M Gonzales et al.
Nutrition & metabolism, 5, 17-17 (2008-06-14)
Adipocytes express inflammatory mediators that contribute to the low-level, chronic inflammation found in obese subjects and have been linked to the onset of cardiovascular disorders and insulin resistance associated with type 2 diabetes mellitus. A reduction in inflammatory gene expression...
Genetic removal of matrix metalloproteinase 9 rescues the symptoms of fragile X syndrome in a mouse model.
Sidhu H, et al.
The Journal of Neuroscience, 34, 9867-9879 (2014)
Dana E Nuti et al.
mBio, 2(4), doi:10-doi:10 (2011-08-19)
Detection of microbial antigens in clinical samples can lead to rapid diagnosis of an infection and administration of appropriate therapeutics. A major barrier in diagnostics development is determining which of the potentially hundreds or thousands of antigens produced by a...
GADD45A and EPB41 as tumor suppressor genes in meningioma pathogenesis.
Piaskowski S, et al.
Cancer Genetics and Cytogenetics, 162, 63-67 (2005)
Maria Marín et al.
Genes, 10(1) (2019-01-20)
XPF endonuclease is one of the most important DNA repair proteins. Encoded by XPF/ERCC4, XPF provides the enzymatic activity of XPF-ERCC1 heterodimer, an endonuclease that incises at the 5' side of various DNA lesions. XPF is essential for nucleotide excision...

Protocols

Immunoprecipitation Procedure

To determine the molecular weights of protein antigens, to study protein/protein interactions, to determine specific enzymatic activity, to monitor protein post-translational modifications and to determine the presence and quantity of proteins.

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