SOC is a microbial growth medium used for the transformation of competent cells (E. coli). This nutrient-rich microbial broth contains peptides, amino acids, water-soluble vitamins, and glucose in a low-salt formulation.
What makes SOC special vs LB?
Compared to LB (both Lennox and Miller), SOC has twice the concentration of tryptone, same conc. of yeast Extract, a tenth (compared to Lennox) of NaCl conc., plus MgSO4, dextrose and KCl. Article Culture of Escherichia coli in SOC medium improves the cloni…
What is SOC media for bacteria?
SOC Medium, shorthand for Super Optimal broth with Catabolite repression, is a nutritionally rich bacterial culture medium. The recipe is differs slightly with LB broth, containing 20 g/L tryptone, 5 g/L yeast extract, and 0.5 g/L sodium chloride.
Why is SOC medium used in bacterial transformation?
SOC Medium is a rich medium used primarily to aid recovery of bacterial competent cells following transformation. Use of SOC medium improves the molecular uptake whilst stabilizing the cells rapidly and so maximizing the efficiency of competent cells.
What SOC media contains?
S.O.C. Medium is supplied as 10 x 10 mL bottles of liquid medium with the following composition: 2% tryptone, 0.5% yeast extract, 10 mM NaCl, 2.5 mM KCl, 10 mM MgCl2, 10 mM MgSO4, and 20 mM glucose.
What is SOC medium in biology?
SOC medium is a ready-to-use solution, useful in the final step of bacterial cell transformation to obtain maximal transformation efficiency of E. coli. Without magnesium chloride, needs to be added before use. Autoclave sterilized.
Why is LB broth used?
Lysogeny broth (LB) is a nutritionally rich medium primarily used for the growth of bacteria. Its creator, Giuseppe Bertani, intended LB to stand for lysogeny broth, but LB has also come to colloquially mean Luria broth, Lennox broth, life broth or Luria–Bertani medium.
What is LB medium used for?
LB medium is a rich medium that is commonly used to culture members of the Enterobacteriaceae as well as for coliphage plaque assays. LB and related media (SOC, Terrific Broth, 2xYT, etc) are used extensively in recombinant DNA work and other molecular biology procedures.
How do I get SOC from SOB?
Making SOB into SOC: If using 50% glucose solution, add 8mL per 1L SOB. We commonly work with 50mL aliquots of SOB and have a 50% stock glucose solution. For easy reference, per 50mL SOB, add 400µL of 50% filter-sterilized glucose solution.
Where is SOC medium stored?
SOC medium can be stored at either 4°C or Room Temperature depending on how fast it will be used. Storing at Room Temperature is convenient and adequate for short term usage (weeks to a couple of months). For long term storage, we recommend storing at 4°C.
How long does SOC medium last?
After receiving GoldBio Recovery Medium, store the medium at 4°C. If stored properly, the medium should be stable for at least 1 year.
What medium is used for growing transformed cells?
Following heat shock or electroporation, transformed cells are cultured in antibiotic-free liquid medium for a short period to allow expression of antibiotic resistance gene(s) from the acquired plasmid to begin (Figure 5).
Can you freeze SOC medium?
I usually aliquot it (~30-50mL) and freeze it. SOC medium is a bacterial growth medium used to maximize the transformation efficiency of cells, so it’s prone to bacterial contamination (it’s the glucose – the little guys love it!). Best to aliquot and freeze the medium. Thanks to you all!
How do you calculate transformation efficiency of competent cells?
The equation for calculating Transformation Efficiency (TE) is: TE = Colonies/µg/Dilution. Efficiency calculations can be used to compare cells or ligations.
How do competent cells work?
Cell competence refers to a cell’s ability to take up foreign (extracellular) DNA from its surrounding environment. The process of genetic uptake is referred to as transformation. In some cases, the genetic material taken in by a cell can become incorporated, or recombined, into its own genome.
Can I autoclave SOC media?
(This solution is made by dissolving 19 g of MgCl2 in 90 mL of deionized H2O. Adjust the volume of the solution to 100 mL with deionized H2O and sterilize by autoclaving for 20 min at 15 psi [1.05 kg/cm2] on liquid cycle.) After the SOB medium has been autoclaved, allow it to cool to 60°C or less.
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Can I use LB broth instead of SOC?
SOC is not mandatory, Instead you can also use LB broth. Transformation is depends on handling, heating-cooling and quantified DNA.
What is sob used for?
Super Optimal Broth (SOB medium) is a nutrient-rich bacterial growth medium used for microbiological culture, generally of Escherichia coli. This nutrient-rich microbial broth contains peptides, amino acids, water soluble vitamins and glucose in a low-salt formulations.
What is recovery broth?
Recovery Broth is added to the cell suspension, and the bacteria are allowed to recover for 30 minutes at 37°C. This recovery period allows the bacteria to repair their cell walls and to express the antibiotic resistance gene.
What is in LB broth that makes it good for bacterial growth?
coli sensitive to osmotic stress developed a formulation of LB containing half the salt of the original formulation, i.e., 0.5% NaCl . This formulation is referred to as LB Lennox. Today, LB Lennox is used for cultivation of E. coli when using salt-sensitive antibiotics such as Blasticidin, Puromycin, and Zeocin.
Is LB broth selective or differential?
The LB culture medium (for lysogeny broth) is a non-selective nutrient culture medium, initially used for bacterial culture. LB media have become an industry standard for the cultivation of Escherichia coli.
How do you grow LB media for bacterial growth?
How to make a 1 L LB media solution. Weigh out 10 g tryptone, 10 g sodium chloride (NaCl) and 5 g yeast extract and add to a 1 L Duran bottle. Measure out approximately 900 mL of distilled water and add to the Duran bottle. Shake the bottle to dissolve the reagents.
What type of media is LB media?
LB Broth, also known as, LB medium, Lysogeny broth, Luria broth, or Luria-Bertani medium, is a commonly used nutritionally rich medium for culturing bacteria. First described in 1951 by Giuseppe Bertani, a 1-liter medium consists of 10 grams of tryptone, 5 grams of yeast extract, and 10 grams of sodium chloride.
Why are the LB nutrient agar plates used in the experiment?
The nutrient agar plates are used in this experiment because they allow the growth of bacteria and compare the different types of growth.