The three-dimensional conformation of biomolecules is of the utmost importance in their interactions; for example, in the binding of a substrate (reactant) to the catalytic site of an enzyme (Fig. 3-8), the two molecules must fit each other closely, in a complementary fashion, for biological function.
DD&A stands for Depletion, Depreciation and Amortization. Suggest new definition. This definition appears frequently and is found in the following Acronym Finder categories: Business, finance, etc.
Degenerative Disc Disease (DDD) Degenerative disc disease is a term used to describe the normal changes in your spinal discs as you age. Between the 32 vertebrae that make up the spine are structures called discs, which act as shock absorbers. The discs are made of a thick coating that surrounds a jelly-like material.