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B-lymphocyte antigen CD19, also known as CD19 molecule (Cluster of Differentiation 19), B-Lymphocyte Surface Antigen B4, T-Cell Surface Antigen Leu-12 and CVID3 is a transmembrane protein that in humans is encoded by the gene CD19. In humans, CD19 is expressed in all B lineage cells. Contrary to some early doubts, human plasma cells do express CD19, as confirmed by others. CD19 plays two major roles in human B cells: on the one hand, it acts as an adaptor protein to recruit cytoplasmic signaling proteins to the membrane; on the other, it works within the CD19/CD21 complex to decrease the threshold for B cell receptor signaling pathways. Due to its presence on all B cells, it is a biomarker for B lymphocyte development, lymphoma diagnosis and can be utilized as a target for leukemia immunot

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  • CD19
  • CD19
  • CD19
  • B-Lymphozytenantigen CD19
  • CD19
  • CD19
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  • La protéine CD19 est un antigène leucocytaire humain retrouvé à la surface des lymphocytes B (dits improprement cellules B). Elle est un constituant essentiel du corécepteur du récepteur des lympocytes B (BCR, pour B cell receptor). Elle est encodée par le gène CD19 qui est porté par le chromosome 16 chez l'humain.
  • CD19, или B-лимфоцитарный антиген CD19 — белок, ко-рецептор, расположенный на поверхности B-лимфоцитов. Продукт гена человека CD19.
  • B-Lymphozytenantigen CD19 ist ein Oberflächenprotein der Immunglobulin-Superfamilie. Es bindet auf der Zelloberfläche von B-Zellen an den B-Zell-Rezeptor und senkt die Schwelle dessen Aktivierbarkeit. So zeigt die Überexpression von CD19 in Mäusen, als auch Knockout-Mäuse, dass CD19 die Signalschwelle von Rezeptoren beeinflusst, die die Selektion, die Aktivierung und die Differenzierung von B-Lymphozyten regulieren. Auf molekularer Ebene ist CD19 involviert in die Aktivierung von Phosphatidylinositol-4,5-bisphosphat-3-Kinasen (PI3K). Es ist glykosyliert und phosphoryliert.
  • B-lymphocyte antigen CD19, also known as CD19 molecule (Cluster of Differentiation 19), B-Lymphocyte Surface Antigen B4, T-Cell Surface Antigen Leu-12 and CVID3 is a transmembrane protein that in humans is encoded by the gene CD19. In humans, CD19 is expressed in all B lineage cells. Contrary to some early doubts, human plasma cells do express CD19, as confirmed by others. CD19 plays two major roles in human B cells: on the one hand, it acts as an adaptor protein to recruit cytoplasmic signaling proteins to the membrane; on the other, it works within the CD19/CD21 complex to decrease the threshold for B cell receptor signaling pathways. Due to its presence on all B cells, it is a biomarker for B lymphocyte development, lymphoma diagnosis and can be utilized as a target for leukemia immunot
  • En inmunología se denomina CD19 (del inglés cluster of differentiation 19) a un tipo de antígeno CD propio del sistema inmune de mamíferos. Se caracteriza por poseer un peso molecular de 95 kDa y su naturaleza bioquímica lo encuadra dentro de la familia de las inmunoglobulinas. Su función biológica en la célula es: formar un complejo con (CR2) y CD81 (TAPA-1); de este modo, actúa como correceptor de las células B, puesto que su dominio citoplasmático une a las citosólicas y la . Se expresa específicamente en células B.​​
  • CD19 (англ. CD19 molecule) – білок, який кодується однойменним геном, розташованим у людей на короткому плечі 16-ї хромосоми. Довжина поліпептидного ланцюга білка становить 556 амінокислот, а молекулярна маса — 61 128. Послідовність амінокислот A: АланінC: ЦистеїнD: Аспарагінова кислотаE: Глутамінова кислотаF: ФенілаланінG: ГліцинH: ГістидинI: ІзолейцинK: ЛізинL: ЛейцинM: МетіонінN: АспарагінP: ПролінQ: ГлутамінR: АргінінS: СеринT: ТреонінV: ВалінW: Триптофан Y: Тирозин
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