V Table contains a strictly ordered system-arrangement in which no AA can replace its place with another AA. It is the CIPS (Cyclic Invariant Periodic System): In position 1 there is a class of chalcogenous amino acids (containing either oxygen or sulfur in the side chain); at position 2 are four amino acids of non-alanine stereochemical type; in position 3 are two additionally acidic AAs (possessing a carboxyl group in the side chain also) and two of their amide derivatives; in position 4 there are two basic aliphatic AAs (alanine and leucine), and two amine derivatives (lysine and arginine); finally, at position 5 are four aromatic amino acids.