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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

[A] cytotoxic cell involved in antibody-dependent cell-mediated immune responses[, that uses Fc] receptors [to recognize] IgG [immunoglobulin G] molecules [to] lyse or damage IgG-coated target cells without mediation of complement.  4, record 1, English, - killer%20cell

Record number: 1, Textual support number: 1 OBS

Kinds of null cells are killer cells and natural killer cells.  5, record 1, English, - killer%20cell

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

La cellule K [...] se lie [aux anticorps] par l'intermédiaire de récepteurs Fc (ou récepteurs pour le fragment Fc des IgG [immunoglobulines G]). [Son] action destructrice est directe et ne nécessite pas l'intervention du complément.  5, record 1, French, - cellule%20tueuse

Record 1,  Textual support,  Spanish

Record number: 1, Textual support number: 1 DEF

Linfocito que se desarrolla en la médula ósea representando una pequeña porción de la población de linfocitos y carece de los marcadores de superficie de los linfocitos B y T. Estimulada por la presencia de un antígeno, la célula nula ataca directamente, sin que tenga que mediar otro mecanismo, por lo que se les llama asesinas naturales.  1, record 1, Spanish, - c%C3%A9lula%20nula

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

The clonal selection theory is based on the proposition that during development each lymphocyte becomes committed to react with a particular antigen before ever being exposed to it. A cell expresses this commitment in the form of surface receptor proteins that specifically fit the antigen. The binding of antigen to the receptors activates the cell, causing it both to multiply and mature. Thus a foreign antigen selectively stimulates those cells that bear complementary antigen-specific receptors and are thus already committed to respond to it. This is what makes immune responses antigen-specific. The term "clonal" in clonal selection derives from the postulate that the immune system is composed of millions of different families, or clones, of cells, each consisting of T or B lymphocytes descended from a common ancestor. Since each ancestral cell is already committed to make one particular antigen-specific receptor protein, all cells in a clone have the same antigen specificity.  1, record 2, English, - clonal%20selection

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

Selon la théorie de la sélection clonale, les lymphocytes [sont] groupés en clones, un clone étant un ensemble de cellules identiques, descendantes d'une même cellule initiale, et exprimant les mêmes potentialités génétiques. Ainsi, chaque clone de lymphocyte B comporte-t-il un ensemble de cellules identiques, chacune synthétisant une espèce d'immunoglobuline, et une seule. Ce clone est sélectivement stimulé par l'antigène reconnu spécifiquement par l'immunoglobuline qu'il exprime.  1, record 2, French, - s%C3%A9lection%20clonale

Record 2,  Textual support,  Spanish

Record number: 2, Textual support number: 1 DEF

Producción de una población de células plasmáticas productoras de un mismo anticuerpo en respuesta a la interacción entre un linfocito B que produce el anticuerpo específico y el antígeno fijado por dicho anticuerpo.  2, record 2, Spanish, - selecci%C3%B3n%20clonal

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

A selective theory of antibody formation developed to explain the vast array of immune globulins capable of being produced and the absence of antibodies that react with the animal's own cells.  2, record 3, English, - clonal%20selection%20theory

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Théorie basée sur le fait que chaque cellule immunitaire (lymphocyte T ou lymphocyte B) possède à sa surface des récepteurs qui lui permettent de reconnaître un seul antigène.  3, record 3, French, - th%C3%A9orie%20de%20la%20s%C3%A9lection%20clonale

Record 3,  Textual support,  Spanish

Record number: 3, Textual support number: 1 DEF

Teoría basada en una especificidad preexistente que explica los hechos observados sobre la formación de anticuerpos; supone que cada linfocito B es capaz de responder a un antígeno específico con el que el organismo podría haber tenido o no un contacto previo.  2, record 3, Spanish, - teor%C3%ADa%20de%20la%20selecci%C3%B3n%20clonal

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

A lymphoid stem cell from the bone marrow that migrates to, and becomes a mature antigen-specific cell in, the spleen and lymph nodes.  2, record 4, English, - B%20cell

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 CONT

Les lymphocytes sont divisés en deux grandes catégories, les lymphocytes B et les lymphocytes T [...] Les lymphocytes B sont les seules cellules de l'organisme qui synthétisent des immunoglobulines ou anticorps.  2, record 4, French, - lymphocyte%20B

Record 4,  Textual support,  Spanish

Record number: 4, Textual support number: 1 DEF

Tipo de linfocito que se encuentra en la médula ósea humana. Son los precursores de las células plasmáticas productoras de anticuerpos.  3, record 4, Spanish, - linfocito%20B