Mouse Monoclonal B23 antibody (STJ98470)


Reactivity: Human, Mouse, Rat, Cow, Pig, Rabbit
Applications: WB, IF
Conjugation: Unconjugated
Supplier: St John’s Laboratory Ltd.

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Mouse Monoclonal B23 antibody (STJ98470)

Supplier: St John’s Laboratory Ltd.

Recommended applications: WB, IF

Recommended dilution: WB 1:1000-1:2000; IF 1:100-1:500

Recommended protocols: check protocols

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Alternative names:

Check alternative names for the antibody


NPM1 antibody, NPM antibody,|B23 antibody|MGC104254 antibody|NO38 antibody|NPM antibody|NPM_HUMAN antibody|NPM1 antibody|Nucleolar phosphoprotein B23 antibody|Nucleolar protein NO38 antibody|Nucleophosmin (nucleolar phosphoprotein B23 numatrin) antibody|Nucleophosmin antibody|nucleophosmin nucleoplasmin family member 1 antibody|Nucleophosmin/nucleoplasmin family member 1 antibody|Numatrin antibody|OTTHUMP00000161024 antibody|OTTHUMP00000161025 antibody|OTTHUMP00000223397 antibody|OTTHUMP00000223398 antibody|Anti-Nucleophosmin antibody [FC82291] (ab10530)
SCBT cat No: sc-47725|sc-70392|sc-65943|sc-6013|sc-271737|sc-56622|sc-32256|sc-5564|sc-53175|



B23 Monoclonal Antibody

Catalogue No.



Human, Mouse, Rat, Cow, Pig, Rabbit


B23 Monoclonal Antibody detects endogenous levels of B23 protein.


Purified recombinant human B23 protein fragments expressed in Ecoli





Recommended dilution

WB 1:1000-1:2000; IF 1:100-1:500






B23 Antibody was tube-contained. Purified in buffer containing 0.1M Tris-Glycine (pH 7.4, 150 mM NaCl) with 0.2% sodium azide, 50% glycerol.


1 mg/ml


B23 Antibody was purified using affinity purification.


-20 Celsius degree. Avoid repeated freeze/thaw cycles.

Alternative antibody names

Nucleophosmin antibody, NPM antibody, Nucleolar phosphoprotein B23 antibody, Nucleolar protein NO38 antibody, Numatrin antibody

Database links

Human UniProt/Swiss-Prot:P06748;Mouse UniPort/Swiss-Prot: Q61937;Rat UniProt/Swiss-Port: P13084;Human Entrez Gene: 4869;Mouse Entrez Gene: 18148;Rat Entrez Gene: Rn.54537

Protein names

Nucleophosmin , NPM , Nucleolar phosphoprotein B23 , Nucleolar protein NO38 , Numatrin

Protein function

Involved in diverse cellular processes such as ribosome biogenesis, centrosome duplication, protein chaperoning, histone assembly, cell proliferation, and regulation of tumor suppressors p53/TP53 and ARF. Binds ribosome presumably to drive ribosome nuclear export. Associated with nucleolar ribonucleoprotein structures and bind single-stranded nucleic acids. Acts as a chaperonin for the core histones H3, H2B and H4. Stimulates APEX1 endonuclease activity on apurinic/apyrimidinic (AP) double-stranded DNA but inhibits APEX1 endonuclease activity on AP single-stranded RNA. May exert a control of APEX1 endonuclease activity within nucleoli devoted to repair AP on rDNA and the removal of oxidized rRNA molecules. In concert with BRCA2, regulates centrosome duplication. Regulates centriole duplication: phosphorylation by PLK2 is able to trigger centriole replication. Negatively regulates the activation of EIF2AK2/PKR and suppresses apoptosis through inhibition of EIF2AK2/PKR autophosphorylation. Antagonizes the inhibitory effect of ATF5 on cell proliferation and relieves ATF5-induced G2/M blockade .

Involvement in disease

Note: A chromosomal aberration involving NPM1 is found in a form of non-Hodgkin lymphoma. Translocation t(2;5)(p23;q35) with ALK. The resulting chimeric NPM1-ALK protein homodimerize and the kinase becomes constitutively activated. .; Note: A chromosomal aberration involving NPM1 is found in a form of acute promyelocytic leukemia. Translocation t(5;17)(q32;q11) with RARA. .; Note: A chromosomal aberration involving NPM1 is a cause of myelodysplastic syndrome (MDS). Translocation t(3;5)(q25.1;q34) with MLF1. .; Note: Defects in NPM1 are associated with acute myelogenous leukemia (AML). Mutations in exon 12 affecting the C-terminus of the protein are associated with an aberrant cytoplasmic location. .

Protein sequence and domain

Belongs to the nucleoplasmin family.

Protein post-translational modifications

Acetylated at C-terminal lysine residues, thereby increasing affinity to histones. / ADP-ribosylated. / Phosphorylated at Ser-4 by PLK1 and PLK2. Phosphorylation at Ser-4 by PLK2 in S phase is required for centriole duplication and is sufficient to trigger centriole replication. Phosphorylation at Ser-4 by PLK1 takes place during mitosis. Phosphorylated by CDK2 at Ser-125 and Thr-199. Phosphorylation at Thr-199 may trigger initiation of centrosome duplication. Phosphorylated by CDK1 at Thr-199, Thr-219, Thr-234 and Thr-237 during cell mitosis. When these four sites are phosphorated, RNA-binding activity seem to be abolished. May be phosphorylated at Ser-70 by NEK2. The Thr-199 phosphorylated form has higher affinity for ROCK2. CDK6 triggers Thr-199 phosphorylation when complexed to Kaposi’s sarcoma herpesvirus (KSHV) V-cyclin, leading to viral reactivation by reducing viral LANA levels. / Sumoylated by ARF.

Protein cellular localization

Nucleus > nucleolus / Nucleus > nucleoplasm / Cytoplasm > cytoskeleton > microtubule organizing center > centrosome

Research area

All research areas>Transcription Regulators>Nucleolar phosphoprotein/nucleophosmin
(View all antibody categories related to Transcription Regulators)


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St John’s Laboratory Ltd.

Product type

Primary antibody


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