Protein is the material basis of life, an organic macromolecule, a basic organic substance that constitutes cells, and the main undertaker of life activities. There is no life without protein. Amino acids are the basic components of protein. It is a substance closely related to life and various forms of life activities. Protein participates in every cell and all important parts of the body. Protein accounts for 0/6% ~ 20% of human body weight, that is, there is about 9.6~ 12kg of protein in a 60kg adult body. There are many kinds of protein in human body, with different properties and functions, but they are all composed of more than 20 kinds of amino acids in different proportions, which are constantly metabolized and updated in the body.
Chinese name
protein
English name
protein
Another name
protein
molecular weight
The average amino acid was 100.
compose
More than 20 kinds of amino acids
Old name
"Prion (ru m 4 n)"
structure
1-4 level
Generation type
Dehydration and condensation
catalogue
The basic meaning of 1
2 correlation calculation
atomicity
molecular weight
Gene control
3 Composition and characteristics
Overall structure
test method
4 physiological needs
5 metabolic absorption
Six symptoms
Too much
deficiency disease
7 usefulness
8 nature
Both sexes
hydrolytic reaction
Colloidal property
deposit
Change the nature of
color reaction
Odor reaction
fold
9 physiological function
Build a human body
Structural substance
Carrier transportation
Antibody immunity
Enzymatic action
Hormone regulation
collagen
Energy substance
The development of 10
1 1 classification information
Classification of demand situation
Shape classification
structure type
source
12 consumption
Related research on 13
14 related disciplines
15 food content
activity
function
Main research of 16
history
research method
Anticancer effect
Omics
Relationship with height
17 supplementary explanation
Computing demand
Postpartum supplement
Fitness crowd supplement
18 network language application
The basic meaning of 1
Protein tetramer (quaternary structure)
Protein is a substance with a certain spatial structure, which is formed by zigzag folding of polypeptide chains composed of amino acids in the form of dehydration and condensation.
Protein must contain carbon, hydrogen, oxygen and nitrogen.
Protein is a polymer compound formed by combining α -amino acids in a certain order to form polypeptide chains, and then combining one or more polypeptide chains in a specific way. Protein is the scaffold and main substance of human tissues and organs, and plays an important role in human life activities. It can be said that there would be no life activities without protein. Protein mainly exists in lean meat, eggs, beans and fish in daily diet. [3]
The lack of protein in men needs more attention than the lack of protein in women. Once men lack protein, it will lead to the decline of sperm quality and sperm motility, and lead to male infertility due to sperm liquefaction.
Protein is a complex organic compound, formerly known as "ru m 4 n".
General formula of amino acid structure
Amino acids are the basic units of protein, and they are linked into peptide chains through dehydration and condensation. Protein is a biomacromolecule composed of one or more polypeptide chains, each of which has 20 to hundreds of amino acid residues (-R). Various amino acid residues are arranged in a certain order. The amino acid sequence of protein is encoded by the corresponding gene. In addition to the 20 basic amino acids encoded by the genetic code, some amino acid residues in protein can be modified after translation to change their chemical structure, thus activating or regulating protein. Multiple protein can form a stable protein complex together, often by combining together, and folding or spiral to form a certain spatial structure, so as to play a specific function. The organelle of peptide synthesis is ribosome on rough endoplasmic reticulum in cytoplasm. The difference between protein and China lies in the type, quantity, arrangement order of amino acids and the spatial structure of peptide chains.
The ingested protein is digested and hydrolyzed into amino acids, which are absorbed in the body to synthesize the protein needed by the human body. At the same time, the new protein is constantly metabolized and always in a dynamic balance. Therefore, the quality and quantity of food protein and the proportion of various amino acids are all related to the amount of protein synthesized by the human body, especially the growth and development of teenagers, the prenatal and postnatal care of pregnant women and the health and longevity of the elderly, which are closely related to the amount of protein in the diet. Protein is divided into complete protein and incomplete protein. Protein, which is rich in essential amino acids, is called complete protein. For example, milk, eggs, fish and meat all belong to complete protein, and soybeans in plants also contain complete protein. Protein, which lacks essential amino acids or has little content, is called incomplete protein, such as protein in cereals, wheat and corn, gelatin in animal skins and bones, etc.