...the key of A minor. 5 n-count The key on a map or diagram or in a technical book is a list of the symbols or abbreviations used and their meanings. You will find a key at the front of the book. 6 adj The key person or thing in a group is the most important one.
ATP (Adenosine triphosphate). 1  It is the major energy currency of the cell, providing the energy for most of the energy-consuming activities of the cell. 2  It is one of the monomers used in the synthesis of RNA and, after conversion to deoxyATP (dATP), DNA.3  It regulates many biochemical pathways. It is the major energy currency of the cell, providing the energy for most of the energy-consuming activities of the cell. 2  It is one of the monomers used in the synthesis of RNA and, after conversion to deoxyATP (dATP), DNA. 3  It regulates many biochemical pathways.
ATP. n. 1. (Biochemistry) adenosine triphosphate; a nucleotide found in the mitochondria of all plant and animal cells. It is the major source of energy for cellular reactions, this energy being released during its conversion to ADP.Formula: C10H16N5O13P3.TP. Short for adenosine triphosphate. An organic compound, C 10 H 16 N 5 O 13 P 3, that is composed of adenosine and three phosphate groups. It serves as a source of energy for many metabolic processes. ATP releases energy when it is broken down into ADP by hydrolysis during cell metabolism.