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Sigma-Aldrich

Hanahan′s Broth (SOB Medium)

powder microbial growth medium

Synonym(s):

Super Optimal Broth

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500 G
R$1,069.00

R$1,069.00

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500 G
R$1,069.00

About This Item

UNSPSC Code:
41106200
NACRES:
NA.85

R$1,069.00

In StockDetails

grade

for molecular biology

Quality Level

100

description

recommended for cultivation of recombinant E. coli.

sterility

non-sterile

form

powder

composition

KCl, 0.186 g/L
MgSO4, 2.4 g/L
NaCl, 0.5 g/L
Tryptone, 20 g/L
Yeast extract, 5 g/L

technique(s)

microbiological culture: suitable

pH

6.8-7.2(2.8% solution)

application(s)

food and beverages
microbiology

storage temp.

room temp

suitability

nonselective for Escherichia coli
nonselective for coliforms

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General description

Hannahan’s Broth (SOB) is a microbial growth medium used for the preparation and transformation of competent cells (E. coli). Casein enzymic hydrolysate and yeast extract supply nitrogenous compounds and growth factors for recombinant Escherichia coli. Potassium chloride and sodium chloride maintain the isotonic condition. Magnesium sulfate is added to the medium as a necessary component for DNA replication.

Application

Hanahan′s Broth is recommended for use in cultivation of recombinant strains of Escherichia coli. It is suitable for the preparation of competent E. coli., often with the addition of 0.4% dextrose. It has also been used for the preparation of C. necator H16 competent cells.[1] It is suitable for non-selective cultivation of E. coli strains for cloning, DNA plasmid production and production of recombinant proteins.

Features and Benefits

Hannahan′s Broth (SOB) powder provides:
  • Standard formulation
  • An inexpensive alternative to liquid

Reconstitution

Stir to suspend 28 g powder in 1L water. Autoclave for 15 minutes at 121°C to sterilize. Allow to cool before making additions, such as antibiotics (if desired).

Other Notes

Casein enzymic hydrolysate and yeast extract supply the necessary nitrogenous compounds and growth factors. Potassium chloride and sodium chloride provide an isotonic environment for the cells. Magnesium sulfate aids DNA replication.

related product

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Description
Pricing

Storage Class Code

10 - Combustible liquids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKCV5945
MKCW9976
MKCS6546
MKCQ5868
MKCP4902

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Sambrook, J., et al.
Molecular Cloning: A Laboratory Manual, 1-1 (1989)
The genetic basis of 3-hydroxypropanoate metabolism in Cupriavidus necator H16
Arenas-LC, et al.
Biotechnology for Biofuels, 12, 150-150 (2019)
Difco Manual, 444-444 (1998)
Nicole Pearcy et al.
PLoS computational biology, 18(5), e1010106-e1010106 (2022-05-24)
Exploiting biological processes to recycle renewable carbon into high value platform chemicals provides a sustainable and greener alternative to current reliance on petrochemicals. In this regard Cupriavidus necator H16 represents a particularly promising microbial chassis due to its ability to
D Hanahan
Journal of molecular biology, 166(4), 557-580 (1983-06-05)
Factors that affect the probability of genetic transformation of Escherichia coli by plasmids have been evaluated. A set of conditions is described under which about one in every 400 plasmid molecules produces a transformed cell. These conditions include cell growth
View All Related Papers

Protocols

Microbial Growth Protocols

General protocols for growth of competent cells in microbial medium.

Questions

1–2 of 2 Questions  

  1. Which bacterial culture medium is the best choice for my application?

    1 answer

    1. 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.

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  2. What is the Department of Transportation shipping information for this product?

    1 answer

    1. 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.

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