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  2. Lactase - Wikipedia

    en.wikipedia.org/wiki/Lactase

    Lactase (EC 3.2.1.108) is an enzyme produced by many organisms and is essential to the complete digestion of whole milk.It breaks down the sugar lactose into its component parts, galactose and glucose.

  3. Beta-galactoside permease - Wikipedia

    en.wikipedia.org/wiki/Beta-galactoside_permease

    Early studies by Hiroshi Nikaido in 1962 suggest a direct relationship between the amount of beta-galactoside permease activity in a cell and the turnover rate of phospholipids in E. coli. In his experiments with gram-positive and gram-negative bacterial cells under varying conditions, the level of P 32 in phospholipids was found to be ...

  4. lac operon - Wikipedia

    en.wikipedia.org/wiki/Lac_operon

    The lactose operon (lac operon) is an operon required for the transport and metabolism of lactose in E. coli and many other enteric bacteria.Although glucose is the preferred carbon source for most enteric bacteria, the lac operon allows for the effective digestion of lactose when glucose is not available through the activity of β-galactosidase. [1]

  5. Coliform bacteria - Wikipedia

    en.wikipedia.org/wiki/Coliform_bacteria

    Escherichia coli (E. coli) can be distinguished from most other coliforms by its ability to ferment lactose at 44 °C in the fecal coliform test, and by its growth and color reaction on certain types of culture media. When cultured on an eosin methylene blue (EMB) plate, a positive result for E. coli is metallic green colonies on a dark purple ...

  6. Lactase persistence - Wikipedia

    en.wikipedia.org/wiki/Lactase_persistence

    Several genetic markers for lactase persistence have been identified, and these show that lactase persistence has multiple origins in different parts of the world (i.e. it is an example of convergent evolution). In particular, it has been hypothesized [58] that the T*13910 variant appeared at least twice independently. Indeed, it is observed on ...

  7. McDonald's beef patties test negative for E. coli in Colorado

    www.aol.com/mcdonalds-beef-patties-test-negative...

    The Colorado Department of Agriculture announced McDonald's brand "fresh and frozen beef patties" tested negative for E. coli after its lab analyzed dozens of subsamples.

  8. Reference ranges for blood tests - Wikipedia

    en.wikipedia.org/wiki/Reference_ranges_for_blood...

    Enzyme activity is commonly used for e.g. liver function tests like AST, ALT, LD and γ-GT in Sweden. [5] Percentages and time-dependent units (mol/s) are used for calculated derived parameters, e.g. for beta cell function in homeostasis model assessment or thyroid's secretory capacity. [citation needed]

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