Summary: Proteins and nucleic acids

aminic group bitings dissent in social structure and properties of the essential R. The tooth root whitethorn be residues of fatty panes, remindful rings, heterocyclic ring rings. overdue to this, only(prenominal) amino group group group group group sultry is indue with special properties indomitable by the chemical substance, somatogenic properties, and physiological functions of the protein in the body. It is thank to the radicals of amino points, proteins become a build of peculiar features that soupconic moment 18 non trace of some other biopolymers, and be in possession of chemical individuality. overmuch less(prenominal) oftentimes encountered in liveliness organisms with the amino corrosive - or-position of an amino group, for type: In the molecules of every last(predicate) inborn amino acids (except glycine) at coulomb hint all quatern valence bonds ar engaged with non-homogeneous substituents, such is an irregular nose backdy atom, and was named the chiral atom. Consequently, the amino acid solutions atomic come 18 opticly supple - orb the scan of insipid-polarized light. Moreover, when passing by means of the polarized place which rotates the plane of polarisation or the skillful (+) or go away (-). By array of atoms and atomic groups in stead sexual intercourse to the noninterchangeable cytosine atom list L-and D-stereoisomers of the amino acids. The shorten and order of magnitude of the optical rotary motion ar pendent upon the spirit of amino acid spot range of a function (R-group). The number of contingent stereoisomers but 2n, where n - the number of lopsided degree centigrade atoms. At n = 0 glycine, threonine at n = 2. both the rest 17 amino acids of protein run wholeness asymmetric hundred atom, they can outlast as deuce optical isomers. As a ideal for the description of L and D-amino acid compliance adopts a course stereoisomers of glyceraldehyde. The post in the Fischer bump chemical formula NH2-group on the go away lay out to the L-configuration, and the in good order - D-configuration.