What Is SOC Medium?


Quick Answer

Super optimal broth with catabolite repression, or SOC medium, is a bacterial growth medium used by microbiologists, explains Sigma-Aldrich. SOC is a nutrient-rich liquid broth that contains peptides, water-soluble vitamins and glucose. The medium is often used in the recovery step of competent cell transformations, especially for E. coli bacteria.

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Full Answer

Standard super optimal broth, or SOB medium, contains the same components as SOC, except it contains no glucose. Carbon catabolite repression allows bacteria to adapt quickly to a preferred carbon and energy source and can be initiated by glucose. The exact components of SOC media are tryptone as a source for amino acids, yeast extract, dextrose, magnesium sulfate, sodium chloride and potassium chloride.

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