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adenosine triphosphate. (ATP) (ÉdÄn`ÉsÄn trÄ«'fÅs`fÄt) , organic compound composed of adenine adenine, organic base of the purine family.n metabolism, ATP is generated from adenosine diphosphate and inorganic phosphate mainly as a consequence of energy-yielding oxidation-reduction reactions. In respiration, ATP is generated during the transport of electrons from the substrate to oxygen via the cytochrome system.
It is formed by the protonation of ammonia (NH 3). Ammonium is also a general name for positively charged or protonated substituted amines and quaternary ammonium cations (NR 4 +), where one or more hydrogen atoms are replaced by organic groups (indicated by R).n example of a reaction forming an ammonium ion is that between dimethylamine, (CH 3) 2 NH, and an acid, to give the dimethylaminium cation, (CH 3) 2 NH + 2 : Quaternary ammonium cations have four organic groups attached to the nitrogen atom. They lack a hydrogen atom bonded to the nitrogen atom.