NPM Colorimetric Cell-Based ELISA Kit

Product Name:	NPM Colorimetric Cell-Based ELISA
Product Code:	CBCAB00783
ELISA Type:	Cell-Based
Target:	NPM
Reactivity:	Human, Mouse, Rat
Dynamic Range:	> 5000 Cells
Detection Method:	Colorimetric 450 nmStorage/Stability:4°C/6 Months
Format:	96-Well Microplate

The NPM Colorimetric Cell-Based ELISA Kit is a convenient, lysate-free, high throughput and sensitive assay kit that can detect NPM protein expression profile in cells. The kit can be used for measuring the relative amounts of NPM in cultured cells as well as screening for the effects that various treatments, inhibitors (ie siRNA or chemicals), or activators have on NPM.

Qualitative determination of NPM concentration is achieved by an indirect ELISA format. In essence, NPM is captured by NPM-specific primary antibodies while the HRP-conjugated secondary antibodies bind the Fc region of the primary antibody. Through this binding, the HRP enzyme conjugated to the secondary antibody can catalyze a colorimetric reaction upon substrate addition. Due to the qualitative nature of the Cell-Based ELISA, multiple normalization methods are needed:

1.	A monoclonal antibody specific for human GAPDH is included to serve as an internal positive control in normalizing the target absorbance values.
2.	Following the colorimetric measurement of HRP activity via substrate addition, the Crystal Violet whole-cell staining method may be used to determine cell density. After staining, the results can be analysed by normalizing the absorbance values to cell amounts, by which the plating difference can be adjusted.

Database Information:	Gene ID: 4869, UniProt ID: P06748, OMIM: 164040, Unigene: Hs.557550
Gene Symbol:	NPM1
Sub Type:	None

UniProt Protein Function:	NPM1: a nucleolar protein associated with nucleolar ribonucleoprotein structures and that binds single-stranded nucleic acids. Is a major component of template activating factor (TAF)-III. It plays a role in controlling centrosome duplication, and may function in the assembly and/or transport of the ribosome. Two alternatively spliced isoforms have been described.
UniProt Protein Details:	Protein type:Translation; RNA-binding; Nucleolus; Oncoprotein Chromosomal Location of Human Ortholog: 5q35.1 Cellular Component: centrosome; cytoplasm; cytosol; focal adhesion; membrane; nucleolus; nucleoplasm; nucleus; ribonucleoprotein complex; spindle pole centrosome Molecular Function:histone binding; NF-kappaB binding; protein binding; protein heterodimerization activity; protein homodimerization activity; protein kinase binding; protein kinase inhibitor activity; ribosomal large subunit binding; ribosomal small subunit binding; RNA binding; Tat protein binding; transcription coactivator activity; unfolded protein binding Biological Process: activation of NF-kappaB transcription factor; cell aging; centrosome cycle; DNA repair; DNA replication-independent nucleosome assembly at centromere; intracellular protein transport; negative regulation of apoptosis; negative regulation of cell proliferation; nucleocytoplasmic transport; nucleosome assembly; positive regulation of cell proliferation; positive regulation of transcription, DNA-dependent; positive regulation of translation; protein localization; protein oligomerization; regulation of centriole replication; regulation of endodeoxyribonuclease activity; response to stress; ribosome assembly; signal transduction; viral reproduction
NCBI Summary:	This gene encodes a phosphoprotein which moves between the nucleus and the cytoplasm. The gene product is thought to be involved in several processes including regulation of the ARF/p53 pathway. A number of genes are fusion partners have been characterized, in particular the anaplastic lymphoma kinase gene on chromosome 2. Mutations in this gene are associated with acute myeloid leukemia. More than a dozen pseudogenes of this gene have been identified. Alternative splicing results in multiple transcript variants.[provided by RefSeq, Nov 2009]
UniProt Code:	P06748
NCBI GenInfo Identifier:	114762
NCBI Gene ID:	4869
NCBI Accession:	P06748.2
UniProt Secondary Accession:	P06748,P08693, Q12826, Q13440, Q13441, Q14115, Q5EU94 Q5EU95, Q5EU96, A8K3N7, B5BU00, D3DQL6,
UniProt Related Accession:	P06748
Molecular Weight:	28,400 Da
NCBI Full Name:	Nucleophosmin
NCBI Synonym Full Names:	nucleophosmin (nucleolar phosphoprotein B23, numatrin)
NCBI Official Symbol:	NPM1
NCBI Official Synonym Symbols:	B23; NPM
NCBI Protein Information:	nucleophosmin
UniProt Protein Name:	Nucleophosmin
UniProt Synonym Protein Names:	Nucleolar phosphoprotein B23; Nucleolar protein NO38; Numatrin
Protein Family:	Nucleophosmin
UniProt Gene Name:	NPM1
UniProt Entry Name:	NPM_HUMAN

Component	Quantity
96-Well Cell Culture Clear-Bottom Microplate	2 plates
10X TBS	24 mL
Quenching Buffer	24 mL
Blocking Buffer	50 mL
15X Wash Buffer	50 mL
Primary Antibody Diluent	12 mL
100x Anti-Phospho Target Antibody	60 µL
100x Anti-Target Antibody	60 µL
Anti-GAPDH Antibody	60 µL
HRP-Conjugated Anti-Rabbit IgG Antibody	12 mL
HRP-Conjugated Anti-Mouse IgG Antibody	12 mL
SDS Solution	12 mL
Stop Solution	24 mL
Ready-to-Use Substrate	12 mL
Crystal Violet Solution	12 mL
Adhesive Plate Seals	2 seals

The following materials and/or equipment are NOT provided in this kit but are necessary to successfully conduct the experiment:

Microplate reader able to measure absorbance at 450 nm and/or 595 nm for Crystal Violet Cell Staining (Optional)
Micropipettes with capability of measuring volumes ranging from 1 µL to 1 ml
37% formaldehyde (Sigma Cat# F-8775) or formaldehyde from other sources
Squirt bottle, manifold dispenser, multichannel pipette reservoir or automated microplate washer
Graph paper or computer software capable of generating or displaying logarithmic functions
Absorbent papers or vacuum aspirator
Test tubes or microfuge tubes capable of storing ≥1 ml
Poly-L-Lysine (Sigma Cat# P4832 for suspension cells)
Orbital shaker (optional)
Deionized or sterile water

*Note: Protocols are specific to each batch/lot. For the correct instructions please follow the protocol included in your kit.

Step	Procedure
1.	Seed 200 µL of 20,000 adherent cells in culture medium in each well of a 96-well plate. The plates included in the kit are sterile and treated for cell culture. For suspension cells and loosely attached cells, coat the plates with 100 µL of 10 µg/ml Poly-L-Lysine (not included) to each well of a 96-well plate for 30 minutes at 37°C prior to adding cells.
2.	Incubate the cells for overnight at 37°C, 5% CO2.
3.	Treat the cells as desired.
4.	Remove the cell culture medium and rinse with 200 µL of 1x TBS, twice.
5.	Fix the cells by incubating with 100 µL of Fixing Solution for 20 minutes at room temperature. The 4% formaldehyde is used for adherent cells and 8% formaldehyde is used for suspension cells and loosely attached cells.
6.	Remove the Fixing Solution and wash the plate 3 times with 200 µL 1x Wash Buffer for five minutes each time with gentle shaking on the orbital shaker. The plate can be stored at 4°C for a week.
7.	Add 100 µL of Quenching Buffer and incubate for 20 minutes at room temperature.
8.	Wash the plate 3 times with 1x Wash Buffer for 5 minutes each time.
9.	Add 200 µL of Blocking Buffer and incubate for 1 hour at room temperature.
10.	Wash 3 times with 200 µL of 1x Wash Buffer for 5 minutes each time.
11.	Add 50 µL of 1x primary antibodies (Anti-NPM Antibody and/or Anti-GAPDH Antibody) to the corresponding wells, cover with Parafilm and incubate for 16 hours (overnight) at 4°C. If the target expression is known to be high, incubate for 2 hours at room temperature.
12.	Wash 3 times with 200 µL of 1x Wash Buffer for 5 minutes each time.
13.	Add 50 µL of 1x secondary antibodies (HRP-Conjugated AntiRabbit IgG Antibody or HRP-Conjugated Anti-Mouse IgG Antibody) to corresponding wells and incubate for 1.5 hours at room temperature.
14.	Wash 3 times with 200 µL of 1x Wash Buffer for 5 minutes each time.
15.	Add 50 µL of Ready-to-Use Substrate to each well and incubate for 30 minutes at room temperature in the dark.
16.	Add 50 µL of Stop Solution to each well and read OD at 450 nm immediately using the microplate reader.

(Additional Crystal Violet staining may be performed if desired – details of this may be found in the kit technical manual.)

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NPM Colorimetric Cell-Based ELISA Kit

Description