Download Biotechnology, 2E, Vol. 9, Enzymes, Biomass, Food and Feed by Gerald Reed, T. W. Nagodawithana PDF

By Gerald Reed, T. W. Nagodawithana

This quantity examines the classical features of biotechnology: the appliance of organic rules for the aim of changing foodstuffs into extra palatable, nutritious or good meals. 4 unique, yet similar parts are lined intimately: enzymes, biomass creation, meals fermentations and feed fermentations. specific recognition is paid to the analytical makes use of of enzymes. additionally, nutrition fermentations are taken care of on a world-wide foundation, from pickles to the Korean kimchi. themes integrated are: construction of Enzymes as nice chemical substances - dietary worth of Microbial Biomass - Baked items - Baker's Yeast construction - Carbohydrate-Based Sweeteners - Wine and Brandy - Brewing - Cheese - Vinegar - Indigenous Fermented meals - Fermented Feeds and Feed vitamins

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Extra resources for Biotechnology, 2E, Vol. 9, Enzymes, Biomass, Food and Feed

Example text

1) s refers to structures in Fig. 8 symport or antiport of a monovalent cation (perhaps a proton) in its mechanism of transport of another compound (KABACK,1970). In these cases, a transmembrane concentration gradient of the monovalent cation (often 'H) may supply the thermodynamic drive for transport. 5 Kinetics of Enzyme-Catalyzed Reactions The field of enzyme kinetics has been strongly influenced by the work of CLELAND, who has written ample reviews of the subject (CLELAND,1967, 1970, 1979, 1990).

The most enlightening form of the turnover number is when it is reported as the ratio of moles of substrate turned over per unit time per mole of enzyme. In this form, it truly represents catalytic efficiency. K,, the ratio of the sum of first-order rate constants (dimension: time - I ) to a second-order rate constant (dimensions: concentration time - I ) , has the units of concentration, and is independent of enzyme concentration, so long as assumption (l), above, is met. It represents an aggregate dissociation constant for ES in that it consists of the ratio of rate constants for dissociation of ES to that for its formation.

Misfolding may also occur upon renaturation of any denatured protein. Such misfolding could occur because of slow cis-trans interconversion of peptide bonds involving proline, or from inappropriate association of hydrophobic regions of the polypeptide that occur more rapidly than correct folding patterns. , 1994). , 1994). , 1994). , 1993) to organisms. Clearly, zymes that catalyze the folding of proteins molecular chaperones are ubiquitous and eswere not known (CORNISH-BOWDEN and sential, not an inconsequential biochemical CARDENAS,1987).

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