高中英语代词、形容词.doc

The first chapter: 1, the level of protein, secondary, tertiary and quaternary structure. Protein molecular structure refers to constitute the protein molecules of amino acid sequence in the polypeptide chain and connection mode.  The secondary structure of protein molecules is refers to the main chain of the protein polypeptide chain local spatial arrangement of atoms.  Polypeptide chain in the second structure on the basis of further crimp fold, forming has certain regularity of the three dimensional space structure, namely for the tertiary structure of a protein.  By two or more than two independent existence and tertiary structure of a polypeptide chain by subordinated bond association of space structure, called the egg White matter of the quaternary structure.  2, what is the degeneration of protein? What is the practical significance. Protein degeneration effect refers to the role of protein in some physical and chemical factors, its spatial structure changes (without changing its primary structure), and thus lose the characteristics of natural protein, this phenomenon is called protein denaturation.  Practical significance: using the modified principle, such as with alcohol, heating and ultraviolet disinfection sterilization, with hot solidification method to check the urine protein, etc.; Prevent the protein denaturation, such as enzyme preparation or save, vaccine and immune serum protein preparation, should choose appropriate conditions, prevent them from degeneration inactivation. 3, the composition of glutathione (GSH) and function? A: GSH is by the valley, in three peptides and glycine. GSH thiol is reducing, and can be used as important reducing agent in the body, has the following some functions: detoxification; Protect protein - HS from oxidation; Reduction of H2O2 in the cell What change after, protein denaturation. A significant reduction in the solubility; Biological activities; Easy by protease hydrolysis; Coagulation precipitati