L3272
LB Broth with agar (Luria low salt)
Powder microbial growth medium
Synonym(s):
Luria Agar Base (Miller’s Modification)
About This Item
grade
for molecular biology
Quality Level
sterility
non-sterile
form
powder
composition
Agar, 15 g/L
NaCl, 0.5 g/L
Tryptone, 10 g/L
Yeast Extract, 5 g/L
technique(s)
microbiological culture: suitable
pH
6.8-7.2(3.05% solution)
application(s)
food and beverages
microbiology
storage temp.
room temp
suitability
nonselective for Escherichia coli
nonselective for coliforms
Related Categories
General description
Application
- for culturing E. coli DH10B cells.
- in the isolation of diazotrophic bacteria.
- for transformation of competent E. coli strain Stbl3 for cloning.
Features and Benefits
- Easy scale-up using larger package sizes
- A budget-friendly alternative to pre-poured plates
- Standard formulation
Preparation Note
2. Heat to boiling while stirring to dissolve.
3. Autoclave for 15 minutes at 121°C.
4. Cool to 50°C prior to dispensing into petri dishes.
Legal Information
related product
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Certificates of Analysis (COA)
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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 between the LB - Luria low salt products?
LB - Luria low salt is available in both powder (L3397) and powder with agar formats (L3272).
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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Protocols
General protocols for growth of competent cells in microbial medium.
Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.
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