Regular tearing down

Hence a regular addition is associated with the mode Li, L2, A2,13 or i/5. The opposite process of a normal (resp. regular) addition is a normal (resp. regular) tearing down. 

Definition 8,7 A single coronoid is regular if it can be subjected to a regular tearing down, hexagon by hexagon, down to benzene. 

It is evident that the tearing down or building up of regular single coronoids as described above, passes exclusively through normal benzenoids and regular coronoids in every step. 

In terms of amount used, the most important function of amino acids is to provide building blocks for the synthesis of proteins in the body. It is estimated that about 75% of amino acid utilization in a normal, healthy adult is for this function. The maintenance of body proteins must occur constantly in the body because tissue proteins break down regularly from normal wear and tear, as well as from diseases and injuries. The amino acids used in this maintenance come from proteins that are eaten and hydrolyzed during digestion, from the body s own degraded tissue, and from the synthesis in the liver of certain amino acids. The amino acids from these three sources constitute what is called the amino acid pool of the body. This cellular supply of amino acids is constantly being restocked to allow the synthesis of new proteins and other necessary metabolic processes to take place as needed. 

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