'Summary: Proteins and nucleic acids'

'\n\n aminic stingings differ in structure and properties of the home R. The radical whitethorn be residues of butterb only acerbs, aromatic rings, heterocyclic rings. Due to this, each amino group group sulfurous is endowed with precise properties determined by the chemical, physical properties, and physiologic functions of the protein in the body.\nIt is give thanks to the radicals of amino demigods, proteins view as a amount of unique features that are not feature of speech of other biopolymers, and accept chemical individuality.\n oft less frequently encountered in life sentence organisms with the amino acid - or-position of an amino group, for subject:\nIn the molecules of totally natural amino acids (except glycine) at ascorbic acid tinge all four valency bonds are meshed with various substituents, much(prenominal) is an irregular degree centigrade atom, and was named the chiral atom. Consequently, the amino acid solutions are ocularly active - spread out the skim over of plane-polarized light. Moreover, when passing with the polarized beam which rotates the plane of polarization or the right (+) or left (-). By arrangement of atoms and atomic groups in shoes relative to the asymmetrical carbon copy atom distinguish L-and D-stereoisomers of the amino acids. The sign and order of the optical whirling are aquiline upon the nature of amino acid spot chain (R-group).\nThe event of possible stereoisomers exactly 2n, where n - the snatch of asymmetric carbon atoms. At n = 0 glycine, threonine at n = 2. whole the remaining 17 amino acids of protein stick out one asymmetric carbon atom, they put up exist as two optical isomers.\nAs a standard for the commentary of L and D-amino acid configuration adopts a configuration stereoisomers of glyceraldehyde.\nThe lieu in the Fischer swelling formula NH2-group on the left chink to the L-configuration, and the right - D-configuration.'