Anti-CD20 Antibody Picoband® (monoklonale, 4D11)

CD20, also known as MS4A1, is an activated-glycosylated phosphoprotein expressed on the surface of all B-cells beginning at the pro-B phase (CD45R+, CD117+) and progressively increasing in concentration until maturity. It is mapped to 11q12.2. This gene encodes a member of the membrane-spanning 4A gene family. The function of CD20 is to enable optimal B-cell immune response, specifically against T-independent antigens. It is suspected that CD20 acts as a calcium channel in the cell membrane. What’s more, this protein may be involved in the regulation of B-cell activation and proliferation.

Eukaryotic translation initiation factor 6; eIF-6; B (2) GCN homolog; B4 integrin interactor; CAB; p27 (BBP) ; EIF6; EIF3A; ITGB4BP; OK/SW-cl.27

MS4A1

931

P11836

Human

No cross-reactivity with other proteins.

E.coli-derived human CD20 recombinant protein (Position: M1-D261) . Human CD20 shares 75% amino acid (aa) sequence identity with mouse CD20.

Clone: 4D11

Expressed at very high levels in colon carcinoma with lower levels in normal colon and ileum and lowest levels in kidney and muscle.

Flow Cytometry

Cell Adhesion Proteins, Epigenetics and Nuclear Signaling, Integrins, Mediator Complex, Neuroscience, Receptors, Transcription

Immunogen affinity purified.

Liquid

Binds to the 60S ribosomal subunit and prevents its association with the 40S ribosomal subunit to form the 80S initiation complex in the cytoplasm. Behaves as a stimulatory translation initiation factor downstream insulin/growth factors. Is also involved in ribosome biogenesis. Associates with pre-60S subunits in the nucleus and is involved in its nuclear export. Cytoplasmic release of TIF6 from 60S subunits and nuclear relocalization is promoted by a RACK1 (RACK1) -dependent protein kinase C activity. In tissues responsive to insulin, controls fatty acid synthesis and glycolysis by exerting translational control of adipogenic transcription factors such as CEBPB, CEBPD and ATF4 that have G/C rich or uORF in their 5'UTR. Required for ROS-dependent megakaryocyte maturation and platelets formation, controls the expression of mitochondrial respiratory chain genes involved in reactive oxygen species (ROS) synthesis. Involved in miRNA-mediated gene silencing by the RNA-induced silencing complex (RISC) . Required for both miRNA-mediated translational repression and miRNA-mediated cleavage of complementary mRNAs by RISC. Modulates cell cycle progression and global translation of pre-B cells, its activation seems to be rate-limiting in tumorigenesis and tumor growth.

1. Cragg MS, Walshe CA, Ivanov AO, Glennie MJ (2005) . The biology of CD20 and its potential as a target for mAb therapy. Curr. Dir. Autoimmun. Current ions in Autoimmunity 8: 140–74. 2. Hardy, Richard (2008) . Chapter 7: B Lymphocyte Development and Biology. In Paul, William.Fundamental Immunology (Book) (6th ed.) . Philadelphia: Lippincott Williams & Wilkins. pp. 237–269. 3. Kuijpers TW, Bende RJ, Baars PA, Grummels A, Derks IA, Dolman KM, Beaumont T, Tedder TF, van Noesel CJ, Eldering E, van Lier RA (January 2010) . CD20 deficiency in humans results in impaired T cell-independent antibody responses. J. Clin. Invest. 120 (1) : 214–22.

At -20 ̊C for one year from date of receipt. Avoid repeated freezing and thawing. Protect from light.

6

Eukaryotic translation initiation factor 6

Nucleolus. Cytoplasm

Mediator of RNA polymerase II transcription subunit 15

Mouse IgG2b

Each vial contains 50% glycerol, 0.9% NaCl, 0.2% Na2HPO4, 0.02% NaN3.