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Merck

H8032

Hanahan′s Broth (SOB Medium)

powder microbial growth medium

Synonym(s):

Super Optimal Broth

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About This Item

NACRES:
NA.85
UNSPSC Code:
41106200

Key Documents

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grade

Molecular Biology

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

Quality Level

100

Related Categories

Preparation Note

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).

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. 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

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.

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.

Storage Class

10 - Combustible liquids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKCQ5868
MKCP4902
MKCM8087
MKCM0259
MKCL3088

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Difco Manual, 444-444 (1998)
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)
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
Francesca Magnani et al.
Nature protocols, 11(8), 1554-1571 (2016-07-29)
The thermostability of an integral membrane protein (MP) in detergent solution is a key parameter that dictates the likelihood of obtaining well-diffracting crystals that are suitable for structure determination. However, many mammalian MPs are too unstable for crystallization. We developed

Protocols

Microbial Growth Protocols

General protocols for growth of competent cells in microbial medium.

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