L2542
LB Broth (Miller)
Liquid microbial growth medium
Synonym(s):
Luria Broth Miller, Luria-Bertani broth, Miller
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About This Item
grade
Molecular Biology
Quality Level
sterility
sterile; 0.2 μm filtered
form
liquid
technique(s)
microbiological culture: suitable
pH
6.5-7.2
application(s)
microbiology
storage temp.
room temp
suitability
nonselective for Escherichia coli
nonselective for coliforms
General description
Application
- non-selective cultivation of E. coli strains for cloning, DNA plasmid production and production of recombinant proteins.
- selective cultivation when appropriate antibiotics are added.
- the cultivation of E-coli cells for anti-bacterial assays.
Features and Benefits
- Filter-sterilized, ready-to-use format
- Convenient package size
- Standard formulation
Other Notes
10 g/L NaCl
5 g/L Yeast Extract
Storage Class Code
12 - Non Combustible Liquids
WGK
nwg
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
Regulatory Information
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Certificates of Analysis (COA)
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If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
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What are the differences among the Luria, Lennox and Miller LB formulations?
LB, (originally termed lysogeny broth) was initially composed of tryptone, yeast extract, NaCl and glucose. Soon after, the glucose was omitted (Miller's version), and later the NaCl content lowered by half (Lennox's version). For some applications, even lower salt is required (Luria's low salt version).
What is the difference among the LB - Miller products?
LB - Miller is available in many types to suit your needs. The different product formats include powder and liquid form. The powder form is also available with agar for easy LB-agar plate preparation.L2542 (LB Miller liquid)L3522 (LB Miller powder)L3147 (LB Miller powder with agar)
Which bacterial culture medium is the best choice for my application?
Each of the broths will likely grow E. coli very well, but there are still general guidelines for choosing a broth when you are working without a protocol. Generally:LB - Miller and LB - Lennox are used for E. coli growth and maintanence, DNA plasmid production and protein production. The Lennox formulation has a lower salt content required for some salt-sensitive selection antibiotics.LB - Luria low salt is used for special applications where the E. coli growth or other constraints require the lowest possible salt content.Terrific Broth is used for higher yield protein production and high yield DNA plasmid production, because of the faster growth of the E. coli in this medium.SOB is used for protein production, DNA plasmid production and the generation of high-efficiency competent cells.SOC is used for initial growth of competent cells and the transformation procedure.
Will adding magnesium to the culture medium increase cell density?
In microbial broth formulations that do not already contain magnesium, the addition of 10-20 mM MgCl2 or MgSO4 may increase cell densities. You may need to also increase the shaking speed of the incubator.
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Articles
Genetic engineering enables large-scale expression and isolation of recombinant proteins for research purposes.
Protocols
General protocols for growth of competent cells in microbial medium.
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