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Topic: X-Antibody

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Antibody - Wikipedia, the free encyclopedia Presently, many antibody-related therapies are undergoing extensive clinical trials for use in practice. Antibodies exist in clonal lines that are specific to only one antigen, e.g., a virus hull protein. "Designed" monoclonal antibody therapy is already being employed in a number of diseases (including rheumatoid arthritis) and in some forms of cancer. en.wikipedia.org /wiki/Antibody   (2378 words)

MSN Encarta - Antibody Antibody, any of perhaps a million kinds of normally occurring protein molecules that are produced in the body of cells called lymphocytes and that act primarily as a defense against invasion by foreign substances. Monoclonal antibodies are used in medicine to detect pregnancy, diagnose disease, and treat conditions caused by toxins or poisonous substances, such as snake venom. In the 1970s scientists learned how to fuse these myeloma cells with lymphocytes from tissues that had been exposed to an antigen. encarta.msn.com /encyclopedia_761571643/Antibody.html   (504 words)

HON Allergy Glossary Antibody Initially bound to B-cells, upon encountering its specific antigen, an antibody/antigen complex stimulates the B-cell to produce copies of the antibody with the aid of helper T-cells. Immunoglobulins (antibodies) are proteins produced by plasma cells (or B-Cells, a type of lymphocyte), which are designed to control the immune response in extracellular fluids by binding to substances in the body that are recognized as foreign antigens (often proteins on the surface of bacteria and viruses). Antibodies are diverse, with more than 1010 possible variations, yet each antibody is designed to recognize only a specfic antigen. www.hon.ch /Library/Theme/Allergy/Glossary/ig.html   (201 words)

antibody - Hutchinson encyclopedia article about antibody Protein molecule produced in the blood by lymphocytes in response to the presence of foreign or invading substances (antigens)&; such substances include the proteins carried on the surface of infecting micro-organisms. Antibody production is only one aspect of immunity in vertebrates. Large quantities of specific antibodies can now be obtained by the monoclonal technique (see monoclonal antibody). encyclopedia.farlex.com /Antibody   (338 words)

CDC - Passive Antibody Administration (Immediate Immunity) as a Specific Defense Against Biological Weapons Antibody preparations continue to be used as antitoxins in the treatment of tetanus (69), diphtheria (69), botulism (18), and venomous bites (70). In fact, antibody preparations in the form of serum therapy were used historically for the treatment of anthrax (13), tularemia (49), and plague (37), albeit in uncontrolled trials that do not meet modern standards for establishing efficacy. Two caveats in the use of passive antibody therapy with immune sera against hemorrhagic fevers that have emerged from studies in animal models are the existence of disease-enhancing antibodies (65) and the need for high-titer sera to achieve protection (66). www.cdc.gov /ncidod/eid/vol8no8/01-0516.htm   (7005 words)

Antibody Staining Tutorial The most likely cause of this problem, which occurs from time to time, is splashing of antibody from one well into the next and is one of the downsides of this method of cell staining, where cells are stained, washed and spun all in the 96 well tray. Consider which antibody binds to the receptor on the cell surface and one can appreciate that the concentration of the primary antibody really is critical to successful labelling of the receptors. When using these labelled antibodies, it is often necessary to utilise a two step staining protocol, either due to lack of availability of a suitable, directly fluorescently labelled primary antibody, or for other reasons such as possible signal amplification. jcsmr.anu.edu.au /facslab/antibody.html   (720 words)

Antiphospholipid Syndrome The antiphospholipid antibody syndrome is an autoimmune phenomenon. The antiphospholipid antibody syndrome, also known as Hughes Syndrome, is a disorder characterized by multiple different antibodies that are associated with both arterial and venous thrombosis (clots). The role of the antiphospholipid antibody syndrome in both arterial and venous thrombotic disorders is an active area of clinical research. www-admin.med.uiuc.edu /hematology/PtAPS.htm   (1308 words)

Antigen-antibody reactions The antibody is mixed with the particulate antigen and a positive test is indicated by the agglutination of the particulate antigen. Immunofluorescence - Immunofluorescence is a technique whereby an antibody labeled with a fluorescent molecule (fluorescein or rhodamine) is used to detect the presence of an antigen in or on a cell or tissue by the fluorescence emitted by the bound antibody. Avidity is influenced by both the valence of the antibody and the valence of the antigen. pathmicro.med.sc.edu /mayer/ab-ag-rx.htm   (3192 words)

Robert Cathcart MD at orthomed.com Antibodies are not "primed" to match antigens unless the antibodies wander into areas that have many free radicals or a relatively oxidized redox state. Additionally, it may be that the B-cell receptors (being identical to the antibodies) on the surface of the B cells are also reduced in tissues with relatively reduced redox potential and the formation of antibodies lessened for that reason. In my limited experience with ascorbate producing animals, I have noticed that in the cases of their surgery, injury, and infection, there is seemingly a shorter period of pain and disability than with humans. www.orthomed.com /unprimed.htm   (6504 words)

antibody An antibody is a protein produced by B-cell lymphocytes of the immune system. One end of the antibody molecule is specifically shaped to bind tightly against the foreign substance. Antibodies are fantastically specific, and are formed in great variety to attach only to unique sections of the antigen. www.drhull.com /EncyMaster/A/antibody.html   (119 words)

Antibody definition - Medical Dictionary definitions of popular medical terms Antibody: An immunoglobulin, a specialized immune protein, produced because of the introduction of an antigen into the body, and which possesses the remarkable ability to combine with the very antigen that triggered its production. Antibodies can be triggered by and directed at foreign proteins, microorganisms, or toxins. Antibody definition - Medical Dictionary definitions of popular medical terms www.medterms.com /script/main/art.asp?articlekey=19101   (294 words)

Antibody Structure This ribbon structure shows the antibody's HV (purple) and FR (yellow) regions of the Fab, and their interaction with an epitope of the antigen. Close-up of a hydrogen bond – The Tyr 101 of the antibody forms a hydrogen bond with the Gln 121 of the antigen. Antibodies are divided into five major classes, IgM, IgG, Iga, IgD and IgE, based on their constant region structure and immune function. www.biology.arizona.edu /immunology/tutorials/antibody/structure.html   (612 words)

Acris Antibodies - Your Antibody Site - Antibody Location Service Antibodies to Dopamine, Dopamine- hydroxylase (DBH), Dopamine-transporter and -receptors This range includes antibodies to most subunits of the mitochondrial OXPHOS complexes suitable for most immunochemical techniques. Antibodies to Gastrin-releasing Peptide (Bombesin) and its Receptors (BRS-3,GRP-R and Neuromedin B-Receptor) www.acris-antibodies.com   (416 words)

The Antibody Resource Page antibody Interfacial contact between antibody and antigen have been shown to vary between 680 and 880 square angstroms for several complexes of antibody Fabs with lysozyme and with neuraminidase. He found that antibody recognition could be probed by quantifying the amount of immunoprecipition observed upon the addition of anti-hapten polyclonal serum to a solution of a small molecule-protein conjugate. Once antibodies are produced, considerable care needs to be taken in their purification to avoid deleterious effects that may affect their study. www.antibodyresource.com /antibody.html   (4912 words)

Monoclonal Antibody Technology - The Basics Second, some antibodies, once activated by the occurrence of a disease, continue to confer resistance against that disease; classic examples are the antibodies to the childhood diseases chickenpox and measles. These antibodies are called monoclonal because they come from only one type of cell, the hybridoma cell; antibodies produced by conventional methods, on the other hand, are derived from preparations containing many kinds of cells, and hence are called polyclonal. Not only can antibodies be used therapeutically, to protect against disease; they can also help to diagnose a wide variety of illnesses, and can detect the presence of drugs, viral and bacterial products, and other unusual or abnormal substances in the blood. www.accessexcellence.org /AB/IE/Monoclonal_Antibody.html   (586 words)

antibody For example, IgG, the most common antibody, is present mostly in the blood and tissue fluids, while IgA is found in the mucous-membrane lining of the respiratory and gastrointestinal tracts. Preformed antibodies, which are derived from the blood serum of previously infected people or animals, are often administered in an antiserum to another person in order to provide him with an immediate, passive immunization against fast-acting toxins or microbes, such as those in snakebites or tetanus infections. Each antibody molecule is essentially identical to the receptor molecule of the original B cell that produced it. www.britannica.com /nobel/micro/26_45.html   (741 words)

Antibody Theory The whole subject of immunity and antibodies is, however, so extremely complex and difficult, especially to the real experts, that it is a relief to be told that the gaps in their knowledge of such things are still enormous. Anti-tetanus antibody titers on admission were 25 IU/ml to 0.15 IU/ml by hemagglutination and ELISA assays; greater than 0.01 IU/ml is considered protective. Yet Dr March says antibody response is generally a poor measure of protection and no indicator at all of safety. www.whale.to /vaccines/antibody.html   (1804 words)

Acetylcholine receptor antibody Encyclopedia Search - Drug Price Search The acetylcholine receptor antibody attacks receptors for the neurotransmitter acetylcholine, which sends signals from nerves to muscles and from nerve to nerve in the brain. Presence of acetylcholinesterase antibody in the blood of patients with symptoms of myasthenia gravis supports the diagnosis, but lack of these antibodies does not rule out this condition. Acetylcholine receptor antibody is an antibody found in the blood of people with myasthenia gravis. www.drug-price-search.com /encyclopedia/?encyclopedia_name_url=87&level=2   (435 words)

Monoclonal Antibody Production Monoclonal antibodies are produced by fusing single antibody-forming cells to tumor cells grown in culture. Once a monoclonal antibody is made, it can be used as a specific probe to track down and purify the specific protein that induced its formation. These antibodies are called "monoclonal antibodies" because they are produced by the identical offspring of a single, cloned antibody producing cell. www.accessexcellence.org /AB/GG/monoclonal.html   (141 words)

How Antibodies are Produced Antibody combined with a plasma component called "complement" may also kill the bacteria directly. The stimulated B cell undergoes repeated cell divisions, enlargement and differentiation to form a clone of antibody secreting plasma cells. That antibody then binds to the bacteria making them easier to ingest by white cells. www.cellsalive.com /antibody.htm   (232 words)

Bugs in the News - What the Heck is an Antibody? Each antibody molecule has two different polymers hooked together - one of these amino acid polymers is known as the Heavy chain and the other one is known as the Light chain. The antibody molecule is a special kind of protein made by a cell of the immune system called the B-lymphocyte. THEN, if the REAL substance or organism later enters our body, we can make a much, much better response - like many, many more specific antibodies for example - and, we might not even know that we have fought-off this danger. people.ku.edu /~jbrown/antibody.html   (1091 words)

Monoclonal Antibodies The antibody combines the antigen-binding parts (variable regions) of the mouse antibody with the effector parts (constant regions) of a human antibody. The antibody combines only the amino acids responsible for making the antigen binding site (the hypervariable regions) of a mouse (or rat) antibody with the rest of a human antibody molecule thus replacing its own hypervariable regions. That is, the system manufactures antibodies of a great range of structures both in their binding regions as well as in their effector regions. users.rcn.com /jkimball.ma.ultranet/BiologyPages/M/Monoclonals.html   (1608 words)

Clontech Laboratories, Inc. - Antibody Microarrays As with DNA arrays, the antibody microarray is designed to be used as a qualitative analysis tool to study the relative abundance between samples of interest. The Ab Microarray is also complimentary to existing DNA array technology and allows you to study the relationship between protein and gene expression using array analysis. The Ab Microarray is a complete analysis system for profiling protein expression in biological samples. www.clontech.com /products/families/abarray/index.shtml   (393 words)

Hybridoma, Antibody Development, Ascites In Vitro Production - MBS Antibody against Influenza A (including H5N1 Avian Flu) MAB722P reacts with all H and N of Influenza A including all avian and swine. Services provided in our cGMP facility include hybridoma development, polyclonal antibody development, ascites and in vitro production and purification. We look forward to working with you on your specific antibody needs, and providing you feedback on your project. www.mainebiotechnology.com   (251 words)

How Accurate is the HIV Antibody Test Whether or not persons who test HIV antibody Western blot indeterminate should be retested depends upon their clinical presentation at the time of testing and what risk factors are present for infection. The HIV antibody ELISA is a screening test and the HIV antibody Western blot is a confirmatory test. The HIV antibody Western blot assay is used on two or more specimens found to be reactive by an HIV antibody ELISA screening assay. www.managingdesire.org /hivtaccu.html   (948 words)

www.bioinf.org.uk : Dr. Andrew C.R. Martin's Group at UCL Following an analysis of the contacts between antibody and antigen in the complex structures available in the Protein Databank, we have generated a set of mean contact data. This definition is likely to be the most useful for people wishing to perform mutagenesis to modify the afinity of an antibody since these are residues which take part in interactions with antigen. The Kabat numbering scheme is a widely adopted standard for numbering the residues in an antibody in a consistent manner. www.bioinf.org.uk /abs   (967 words)

Antibody Labeling The extremely reactive nitrene formed upon brief irradiation of azido nucleotides, forms a permanent, covalent bond with the antibody which is stable to extremes of pH and temperature. Since the ALT antibody labeling process involves covalent attachment of photoactive nucleotide triphosphates, up to three radioactive phosphates can be incorporated per nucleotide. Many companies producing monoclonal antibodies for therapy are choosing to improve their products through the use of radiolabeling. www.altcorp.com /AffinityLabeling/ablabeling.htm   (1333 words)

Antibody Each type of antibody is unique and defends the body against one specific type of antigen. They are produced by the immune system in response to foreign substances that may be a threat to the body -- such as chemicals, virus particles, spores, or bacterial toxins. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. www.healthscout.com /ency/1/002223.html   (152 words)

Antibody Production and Purification Pierce provides carrier proteins and adjuvants for producing antibodies, titering and isotyping kits for characterizing antibodies, affinity supports for purifying antibodies, and immobilized proteases and kits for preparing antibody fragments. The widest array of supports for antibody purification, including common choices such as Protein A and Protein G as well as unique supports such as Protein A/G, Protein L and Melon Gel. KLH and other carrier proteins are ready to bind haptens through sulfhydryl, amine or carboxyl groups make it easy to produce antibodies to almost any molecule. www.piercenet.com /products/browse.cfm?fldID=0101   (172 words)

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