By object
According to the object of action, it can be divided into antitoxin, antibacterial antibody, antiviral antibody and cytophilic antibody (immunoglobulin that can bind to the cell, such as lgE-reactive antibody in type 1 allergy, can be adsorbed on the target cell membrane).
According to physical and chemical properties and biological functions
According to physical and chemical properties and biological functions, it can be divided into five categories: IgM, IgG, IgA, IgE and IgD.
IgM antibodies are the first secreted antibodies in the immune response. After binding to the antigen, they initiate the cascade of complement. They also connect intruders to each other to form a pile for macrophages to swallow;
IgG antibodies activate complement and neutralize multiple toxins. IgG lasts a long time and is the only antibody that can protect the fetus by crossing the placenta during pregnancy. They also secrete into the colostrum from the breast to protect the newborn;
IgA antibodies enter the mucosal surface of the body, including the mucous membranes of respiration, digestion, reproduction, etc., to neutralize infectious agents. It can also be delivered to the neonatal digestive tract mucosa through the colostrum of breast milk, which is the most important type of antibody in breast milk;
The tail of the IgE antibody binds to the cell membrane of basophils and mast cells. When the antibody binds to the antigen, basophils and mast cells release histamine-like substances to promote the development of inflammation. This is also the antibody that triggers the immediate allergic reaction;
The role of IgD antibodies is not yet clear. They mainly appear on the surface of mature B lymphocytes, which may be related to the differentiation of B cells. (IgD was discovered from human myeloma protein in 1995, and its molecular weight is 175kD, which is mainly produced by plasma cells from tonsils and spleen. The concentration of IgD in human serum is 3 ～ 40μg / ml, which is less than 1% of the total serum Ig. It is synthesized late in the individual's development. The IgD hinge region is very long and sensitive to protease hydrolysis, so the IgD half-life is very short, only 2.8 days. The exact immune function of IgD in serum is not yet known. During the differentiation of B cells to mature B cells, In addition to expressing SmIgD, it shows immune tolerance after antigen stimulation. After the activation of mature B cells or after activation or becoming memory B cells, SmIgD gradually disappears.)
Response by visible
According to whether there is a visible reaction after binding to the antigen, it can be divided into: complete antibodies with visible binding reaction with the participation of the medium, that is, commonly known as antibodies, and no visible reaction, but can inhibit the antigen and its corresponding complete Incomplete antibody bound by antibody.
By antibody source
According to the source of antibodies, they can be divided into natural antibodies and immune antibodies.
Antibodies are immunoglobulins, modified globulin molecules. It is stimulated by specific antigens. The production of antibodies is caused by the interaction of various immune cells after the antigen invades the body, so that the B cells in the lymphocytes differentiate and proliferate to form plasma cells, which can produce secreted antibodies.
Beijing Jiehui Biotechnology Co., Ltd. is established on the basis of the State Key Laboratory. It is a high-tech enterprise co-founded by senior personnel with backgrounds in life sciences, biotechnology, and returned overseas students.
The company specializes in operating experimental instruments, research reagents and laboratory consumables in the field of biological sciences, and is committed to providing first-class services to biological science researchers at home and abroad.
At present, the company's products cover biochemistry, molecular biology, immunology, cell biology and other related fields. Due to the characteristics of high quality and stability, high cost performance, etc., it has won a good reputation in the majority of scientific research institutions, research schools and related enterprises. Thus established a three-dimensional marketing network and has a wide range of customer resources.
While providing high-quality products to users, the company always puts customer service and technical support in a more important position than product sales. The company hires full-time and part-time technical support personnel to provide professional and personalized technical services to customers.
Adhering to the concept of "being a person first, then doing things", the company adheres to the tenet of "taking quality as life and customer as center", and dedicate the best quality products and the most considerate service to our customers.
- Chop large pieces of fruit, vegetables, boneless meats, herbs, nuts, and even ice by hand with this handy chopper.
- Simply place ingredients in the container, twist and lock the lid, and pull the cord to spin the chopping blades.
- Perfect for whipping up batches of pesto, hummus, salsa, guacamole, and more, this chopper also comes with a sealing storage lid to keep ingredients in the container. Kitchen Utensils and gadgets, kitchenware, Kitchen Accessories, kitchen helper and houseware.
Vegetable Chopper,Vegetable Cutter,Manual Vegetable Chopper,Stainless Steel Vegetable Chopper
Yangjiang Homelife Industry & Trading Co., Ltd. , https://www.bettyhomelife.com