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.
Justification and Approval (J&A) [Suggest Change] Justification and Approval (J&A) is a document required to justify and obtain appropriate level approvals to contract without providing for full and open competition as required by the Federal Acquisition Regulation (FAR).