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.
The term DDA is most often used to refer to transaction accounts, also called checking accounts. DDA accounts offer offer checks, ATM or debit cards and overdraft protection, if the account owner wishes. There are no restrictions on the number of withdrawals and deposits a user can have in given period.