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L0543 Sigma-Aldrich

LB Agar Kanamycin-50, Plates

pre-poured LB agar plates with 50 ug/ml kanamycin



Related Categories Bacterial Culture Media, Broth / Media, Core Bioreagents, LB Agar and LB Broth, LB Plates,
Quality Level   200
grade   for molecular biology
sterility   sterile; autoclaved
form   plates (10cm, 20-25ml each)
storage temp.   2-8°C
suitability   selective for Escherichia coli
  selective for coliforms


General description

Miller’s LB is a highly-referenced microbial growth medium used for the cultivation of E. coli. This nutrient-rich microbial broth contains peptides, amino acids, water-soluble vitamins, and carbohydrates in a low-salt formulation. The addition of agar provides a solid medium for microbial growth.


Suitable for selective cultivation of E. coli strains that contain plasmids conferring kanamycin resistance. The bacteria can be used for DNA plasmid production or production of recombinant proteins. LB Agar Kanamycin-50, Plates has been used in the screening of Agrobacterium tumefaciens and E.coli JM83 strain with pGD103 plasmid.

Features and Benefits

Miller’s LB Agar plates provide:
• Convenient, ready-to-use 10cm format
• Standard formulation plus antibiotic


15g/L Agar
10g/L Tryptone
10g/L NaCl
5g/L Yeast Extract
50μg/ml kanamycin

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
How do I get lot-specific information or a Certificate of Analysis?
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
How do I find price and availability?
There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote. USA customers: 1-800-325-3010 or view local office numbers.
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
Why do the LB-agar plates with antibiotics have such a short expiration date?
The antibiotics in the LB-agar platesare not stable.The antibiotic degrades over time, making it ineffective at selecting transformed bacteria grown on the plate.Because of this, we recommend the plates are used as soon as possible once they are received.For labs with low use, the plates may expire quickly, so they may benefit from pouring their own plates using the LB - Miller powder with agar formulation (L3147).
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Protocols & Articles


Protein Expression Systems

The development of genetic engineering and cloning has opened many possibilities of expression and isolation of heterologous proteins for research purposes. Considerable advances in technology have e...
Keywords: Amplification, Antibiotics, Cell disruption, Cloning, Culture media, Gene expression, Genetic, Genetics, Glycosylations, Molecular biology, Purification, Pyrogens, Transfection, transformation


Bacterial Transformation

Bacterial transformation is a process of horizontal gene transfer by which some bacteria take up foreign genetic material (naked DNA) from the environment. It was first reported in Streptococcus pneu...
Keywords: Antibiotics, Cloning, Environmental, Gene expression, Genetic, Molecular biology, Peptide synthesis, Polymerase chain reaction, Transfection, transformation

Transforming E. coli with Engineered Plasmid

Inoue and colleagues developed this method in 1990. It works well for many strains commonly used in cloning. The original method calls for growing the overnight E. coli cultures at 18°C. We find that...
Keywords: Antibiotics, Centrifugation, Cloning, Peptide synthesis, Phase transitions, transformation

Peer-Reviewed Papers


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