Two or more amino acids are connected by peptide bonds, and the "amino chain" or "amino acid string" formed is called peptide. Among them, the peptide consisting of 10 amino acids is called "polypeptide", and the peptide consisting of 2-9 amino acids is called "oligopeptide".
Active peptides mainly control the growth, development, immune regulation and metabolism of human body, and are in a state of balance in human body. If the number of active peptides decreases, the function of human body will change obviously.
Peptide plays the role of many hormones in human body, and is the substrate and source of many hormones.
The growth and development of human body are related to many factors, especially protein and protein, which exist in the form of peptides, and the primary material basis of human growth and development is peptides.
Human growth and development can not be separated from hormones, and hormones are also a manifestation of peptides. Therefore, the growth and development of human body can not be separated from peptides in any case, and peptides play an important role in the growth and development of human body.
Extended data:
Biopeptide is a kind of degraded small molecular collagen, which contains amino acid groups and belongs to raw materials. Peptide is also a component existing in human body, which is a chain structure formed by amino acids. The protein we are familiar with is a polypeptide chain. Because the composition and sequence of amino acids are different, different peptides are formed.
A compound with two amino acids linked by peptide bonds is called dipeptide, and so on. A compound with nine amino acids is called nonapeptide, a peptide with multiple amino acids (generally 50, or 100) is called polypeptide, and the amino acid units that make up the polypeptide are called amino acid residues. Peptide bonds connect amino acids with their heads and tails.
The production technology of microbial fermentation mainly uses modern microbial fermentation technology to transform macromolecules into small peptides. By controlling microbial metabolism and fermentation conditions, peptides with different amino acid sequences and different molecular weights can be produced. In the fermentation process, the produced free amino acids are absorbed and utilized by microorganisms again, and there is no feedback inhibition on microbial metabolism.
Through microbial metabolism, amino acids and small peptides are grafted and rearranged, and some peptide groups are modified and recombined. For example, the soybean peptide produced by microbial fermentation of soybean meal changed the inherent amino acid sequence of soybean protein and modified the hydrophobic amino acid terminal of the peptide.
Soybean peptide is bitter-free, has high activity, and is endowed with some biological activity functions. It belongs to the high-tech range of bioengineering and has high technology content, and can be applied to food industry, fermentation industry, feed industry, pharmaceutical industry, cosmetics industry, plant nutrition promoter and other industries. It is widely used and has a very broad development and application prospect.
References:
Baidu encyclopedia-small molecular active peptide