生化重点（Biochemical highlights）.docVIP

生化重点（Biochemical highlights） Chapter 1 1. component elements of proteins: Carbon, hydrogen, oxygen, nitrogen and sulfur; a small amount of phosphorus or metal elements such as iron, copper, zinc, manganese, cobalt, molybdenum; individual iodine nitrogen; very close to the average for 16. 2. the unit of protein composition: Amino acids (20 species) 3. amino acids classification: Non polar aliphatic amino acids (Glycine, C, valine, isoleucine light, etc.); the polarity of neutral amino acids (silk, cysteamine, eggs, Jiangsu, asparagine, glutamine); the aromatic amino acid (phenylalanine, tyrosine, color); the acidic amino acids (aspartic, Valley); alkaline. (LAI, essence, amino acid group). Physical and chemical properties of 4. amino acids: It has the property of amphoteric dissociation; the amino acid containing conjugated double bond has the property of ultraviolet absorption; the amino acid reacts with the three keto ketone to form blue purple compound. 5. peptides - amino acids in proteins combine together. 6. polypeptide chains having two ends (N ends, C ends) and polypeptides typically having 10 to 50 amino acids linked together. 7. level 1 to four structure of protein: The protein molecules, from the N to the C terminal amino acid sequence called the primary structure, the main chemical bond is a peptide bond, also has two disulfide bonds; the local spatial structure of a peptide II protein molecule conformation, does not involve the side chains of amino acid residues called two level structure. Including the alpha helix and beta folding, beta angle and random coil; the relative location of all amino acid residues in the peptide chain, namely the arrangement of the whole chain of all atoms in a three-dimensional space called the three level structure; a three-dimensional spatial arrangement between the specific subunit and the subunit and, with non covalently connected layout and interaction space arrangement of each subunit of this protein molecule and the su