169 results found

Search Results for: o antigen

Antigen

Antigen Definition What is an antigen? A simple definition is that an antigen refers to any substance that triggers an... Read More

O antigen

Definition noun (microbiology) A repetitive glycan polymer attached to the core oligosaccharide of the LPS layer of certain... Read More

Immune response

Immune Response Definition An immune response is defined as the reaction of the body in response to the presence of a... Read More

Opsonization

Definition noun, plural: opsonizations The process at which opsonins bind to the surface of the antigen so that the... Read More

Plasmablast

Definition noun, plural: plasmablasts An antibody-producing stem cell that could give rise to another of its kind or... Read More

H antigen

Definition noun (immunology) A major blood group antigen that defines blood type O; the essential precursor of major ABO... Read More

Antiserum

Definition noun, plural: antiserums, antisera A serum containing immunoglobulins that act against specified... Read More

Plasma B cell

Definition noun, plural: plasma B cells A large B lymphocyte that when exposed to antigen, produce, and secrete large... Read More

Passive agglutination

Definition noun An agglutination reaction of inert particles coated with soluble antigen through an antiserum specific for... Read More

Memory B cell

Definition noun, plural: memory B cells A small, long-lived B lymphocyte that was previously exposed to a particular... Read More

Exogenous antigen

Definition noun Antigen that enters the body of the organism from the outside, e.g. through inhalation, ingestion, or... Read More

Endocytosis

Endocytosis Definition What is endocytosis in biology? Endocytosis is a cellular process by which a cell internalizes any... Read More

Radial immunodiffusion

Definition noun A quantitative immunodiffusion technique used to detect the level of protein (antigen) in a sample by... Read More

Tissue-specific antigen

tissue-specific antigen --> organ-specific antigen A heterogenetic antigen with organ specificity; e.g., in addition to... Read More

Active agglutination

Definition noun An agglutination reaction in which the antigen is found naturally on particle Supplement Agglutination... Read More

Immunisation

Definition noun A process which renders to organism immunity to a specific disease by exposing the organism to an antigen to... Read More

Complement fixation test

Definition noun (immunology) A form of immunological test for the detection of the presence of either a particular antibody... Read More

B lymphocyte

Definition noun, plural: B lymphocytes A lymphocyte that is produced in the bone marrow and is responsible for the... Read More

Reverse passive agglutination

Definition noun A type of agglutination reaction in which known antibody is bound to a carrier particle instead of the... Read More

Opsonin

Definition noun, plural: opsonins Any substance (e.g. antibody) that binds to the surface of a particle (e.g. antigen) to... Read More

Immunization

Definition noun A process which renders to organism immunity to a specific disease by exposing the organism to an antigen to... Read More

Organ-specific antigen

organ-specific antigen A heterogenetic antigen with organ specificity; e.g., in addition to species-specific antigen, kidney... Read More

Heterogenetic antigen

Heterogenetic antigen An antigen which is possessed by a variety of different phylogenetically unrelated species; e.g., the... Read More

Antigen-antibody complex

Antigen-antibody complex The complex formed by the binding of antigen and antibody molecules. The deposition of large... Read More

Antibody

Definition noun, plural: antibodies Any of the numerous Y-shaped gamma globulin proteins found in the blood or lymph, and... Read More

Somatic antigen

somatic antigen An antigen located in the cell wall of a bacterium in contrast to one in the flagella (flagellar antigen) or... Read More

T-helper cell

Definition noun, plural: T-helper cells A type of T lymphocyte that assists by activating antigen-presenting leukocytes,... Read More

Endogenous antigen

Definition noun Antigen that is produced from within the cell as part of normal cell metabolism or when the cell is infected... Read More

Neoantigen

Definition noun, plural: neoantigens A newly expressed antigen on tumor cells or cells infected with... Read More

Codominance

Codominance Definition Codominance is a form of inheritance wherein the alleles of a gene pair in a heterozygote are fully... Read More

Immunoglobulin

Definition noun, plural: immunoglobulins (1) Any of several classes of structurally related glycoproteins in the blood... Read More

Soluble antigen

soluble antigen viral antigen that remains in solution after the particles of virus have been removed by means of... Read More

Haptene

Definition noun, plural: haptenes A substance that induces immune response when bound to a carrier protein or to large... Read More

Natural killer T cell

Definition noun, plural: natural killer T cells A T cell capable of destroying infected cells and infective particles upon... Read More

Tolerogen

Definition noun A foreign antigen that suppresses immune response, or produces immune tolerance. Supplement In comparison... Read More

Avidity

Definition noun, plural: avidities The combined strength of bond affinities in a complex. Usage The term may be used in... Read More

Hapten

Definition noun, plural: haptens A substance that induces immune response when bound to a carrier protein or to large... Read More

Memory cell

Definition noun, plural: memory cells A long-lived immune cell that has the ability to recognize a foreign particle that it... Read More

Flagellar antigen

Flagellar antigen The heat-labile antigens associated with bacterial flagella, in contrast to somatic antigen. See: h... Read More