Citrate Metabolism

Citrate is present in only low levels (0.15-0.2%) in milk and O-type starters do not include the citrate utilizing Lc. lactis subsp. lactis biovar diacetylactis. Diacetyl, an end product of citrate catabolism, however, is an important flavor component in Cheddar cheese (17).

Homofermentative Lactose Metabolism
Figure 2 Pathway of lactose metabolism in cheese LAB. (Homofermentative and heterofermenta-tive routes are indicated by intact and broken lines, respectively.)

Other end products of citrate metabolism—acetoin and 2,3-butanediol—are flavorless, although the carbon dioxide released may affect the texture of the cheese. In Cheddar cheese it is probable that the citrate is metabolized by the adventitious lactobacilli (100,101) although its value as an energy source for growth is equivocal (82,100).

Your Metabolism - What You Need To Know

Your Metabolism - What You Need To Know

If you have heard about metabolism, chances are it is in relation to weight loss. Metabolism is bigger than weight loss, though, as you will learn later on. It is about a healthier, better you. If you want to fire up your metabolism and do not have any idea how to do it, you have come to the right place. If you have tried to speed up your metabolism before but do not see visible results, you have also come to the right place.

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Responses

  • ottavia
    How is lactose metabolized?
    7 years ago

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