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Purified Mouse Anti-Human Retinoblastoma Protein
Purified Mouse Anti-Human Retinoblastoma Protein

Left: Cell cycle expression of retinoblastoma proteins (Rb) in MOLT-4 human leukemia cell line expressing Rb. Rb migrates as multiple bands due to varying degrees of phosphorylation. Whole cell lysates from synchronized MOLT-4 cultures were seperated by SDS-PAGE (4-20% gradient). Blots were incubated with anti-Rb at 2 µg/mL (Cat. No.554136). Cell cycle stages are denoted as Q (quiescent), G1, S, and M. pRb, underphosphorylated Rb. ppRb, phosphorylated and highly phosphorylated species of Rb.  Right: Immunofluorescent staining of A549 (ATCC CCL-185) cells. Cells were seeded in a 96 well imaging plate (Cat. No. 353219) at ~ 10,000 cells per well. After overnight incubation, cells were stained using the alcohol perm protocol and the anti-Rb (332-344) antibody. The second step reagent was FITC goat anti mouse Ig (Cat. No. 554001).  The image was taken on a BD Pathway™ 855 Bioimager using a 20x objective. This antibody also stained U-2 OS (ATCC HTB-96) and HeLa (ATCC CCL-2) cells using both the Triton™ X-100 and alcohol perm protocols (see Recommended Assay Procedure).

Left: Cell cycle expression of retinoblastoma proteins (Rb) in MOLT-4 human leukemia cell line expressing Rb. Rb migrates as multiple bands due to varying degrees of phosphorylation. Whole cell lysates from synchronized MOLT-4 cultures were seperated by SDS-PAGE (4-20% gradient). Blots were incubated with anti-Rb at 2 µg/mL (Cat. No.554136). Cell cycle stages are denoted as Q (quiescent), G1, S, and M. pRb, underphosphorylated Rb. ppRb, phosphorylated and highly phosphorylated species of Rb.  Right: Immunofluorescent staining of A549 (ATCC CCL-185) cells. Cells were seeded in a 96 well imaging plate (Cat. No. 353219) at ~ 10,000 cells per well. After overnight incubation, cells were stained using the alcohol perm protocol and the anti-Rb (332-344) antibody. The second step reagent was FITC goat anti mouse Ig (Cat. No. 554001).  The image was taken on a BD Pathway™ 855 Bioimager using a 20x objective. This antibody also stained U-2 OS (ATCC HTB-96) and HeLa (ATCC CCL-2) cells using both the Triton™ X-100 and alcohol perm protocols (see Recommended Assay Procedure).

Product Details
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BD Pharmingen™
Human (QC Testing), Mouse, Rat, Monkey, Quail, Mink (Reported)
Mouse IgG1
Human Rb aa. 332-344
Intracellular staining (flow cytometry), Western blot (Routinely Tested), Bioimaging (Tested During Development), Immunohistochemistry-formalin (antigen retrieval required), Immunohistochemistry-frozen, Immunoprecipitation (Reported)
110-116 kDa
0.5 mg/ml
AB_395259
Aqueous buffered solution containing ≤0.09% sodium azide.
RUO


Preparation And Storage

Store undiluted at 4°C. The monoclonal antibody was purified from tissue culture supernatant or ascites by affinity chromatography.

Recommended Assay Procedures

Bioimaging

1. Seed the cells in appropriate culture medium at ~10,000 cells per well in a BD Falcon™ 96-well Imaging Plate (Cat. No. 353219) and culture overnight.

2. Remove the culture medium from the wells, and fix the cells by adding 100 μl of BD Cytofix™ Fixation Buffer (Cat. No. 554655) to each well.  Incubate for 10 minutes at room temperature (RT).

3. Remove the fixative from the wells, and permeabilize the cells using either BD Perm Buffer III, 90% methanol, or Triton™ X-100:

a. Add 100 μl of -20°C 90% methanol or Perm Buffer III (Cat. No. 558050) to each well and incubate for 5 minutes at RT.

     OR

b. Add 100 μl of 0.1% Triton™ X-100 to each well and incubate for 5 minutes at RT.

4. Remove the permeabilization buffer, and wash the wells twice with 100 μl of 1× PBS.

5. Remove the PBS, and block the cells by adding 100 μl of BD Pharmingen™ Stain Buffer (FBS) (Cat. No. 554656) to each well. Incubate for 30 minutes at RT.

6. Remove the blocking buffer and add 50 μl of the optimally titrated primary antibody (diluted in Stain Buffer) to each well, and incubate for 1 hour at RT.

7. Remove the primary antibody, and wash the wells three times with 100 μl of 1× PBS.

8. Remove the PBS, and add the second step reagent at its optimally titrated concentration in 50 μl to each well, and incubate in the dark for 1 hour at RT.

9. Remove the second step reagent, and wash the wells three times with 100 μl of 1× PBS.

10. Remove the PBS, and counter-stain the nuclei by adding 200 μl per well of 2 μg/ml Hoechst 33342 (e.g., Sigma-Aldrich Cat. No. B2261) in 1× PBS to each well at least 15 minutes before imaging.

11. View and analyze the cells on an appropriate imaging instrument.

Bioimaging:  For more detailed information please refer to http://www.bdbiosciences.com/support/resources/protocols/ceritifed_reagents.jsp

Western blot:  For more detailed information please refer to http://www.bdbiosciences.com/pharmingen/protocols/Western_Blotting.shtml

Product Notices

  1. Since applications vary, each investigator should titrate the reagent to obtain optimal results.
  2. This antibody has been developed and certified for the bioimaging application. However, a routine bioimaging test is not performed on every lot. Researchers are encouraged to titrate the reagent for optimal performance.
  3. Triton is a trademark of the Dow Chemical Company.
  4. Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
  5. Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
554136 Rev. 16
Antibody Details
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G3-245

Members of the retinoblastoma (Rb) family, including the related proteins p107 and p130, share several properties, including the ability to regulate E2Fdependent transcription and to regulate cell-cycle progression. The Rb gene product is a phosphoprotein that is expressed in most normal cells of vertebrates. Rb acts as a tumor suppressor by providing a cell cycle checkpoint between the G1 and S phases. The active, underphosphorylated form of Rb (Rb or pRb) is primarily found in resting or fully differentiated cells. The activity of Rb is negatively regulated by cyclin dependent kinases, which phosphorylate Rb in late G1. Thus, the hyperphosphorylated form (ppRb) is primarily found in proliferating cells. pRB inactivation is a critical step leading to S-phase commitment at the G1 checkpoint of the cell cycle. In addition, the underphosphorylated form of Rb may bind to viral oncogenes such as SV40 large T Ag, adenoviral EIA and HPV-E7, which may contribute to the transforming activity of these viral oncoproteins.

G3-245 was made using a Trp-E-Rb fusion protein as immunogen and recognizes an epitope between amino acids 332-344 (DARLFDHDKTLQ) of the human retinoblastoma protein (pp110-114 Rb).  In western blot analysis, Rb migrates as multiple closely-spaced bands between 110-116 kD on SDS-PAGE.  The bands represent different Rb phosphorylation states where the level of Rb phosphorylation can be cell cycle and/or cell-type dependent (i.e all forms may not be seen in all cell types that express Rb).  G3-245 has been reported to recognize human, monkey, mouse, rat, mink and a putative quail Rb.  This antibody has also been referred to as Mh-RB-02,20 and mAb-245.

554136 Rev. 16
Format Details
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Purified
Tissue culture supernatant is purified by either protein A/G or affinity purification methods. Both methods yield antibody in solution that is free of most other soluble proteins, lipids, etc. This format provides pure antibody that is suitable for a number of downstream applications including: secondary labeling for flow cytometry or microscopy, ELISA, Western blot, etc.
Purified
554136 Rev.16
Citations & References
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Development References (9)

  1. Bignon YJ, Chen Y, Chang CY, et al. Expression of a retinoblastoma transgene results in dwarf mice. Genes Dev. 1993; 7(9):1654-1662. (Clone-specific: Western blot). View Reference
  2. Cance WG, Brennan MF, Dudas ME, Huang CM, Cordon-Cardo C. Altered expression of the retinoblastoma gene product in human sarcomas. N Engl J Med. 1990; 323(21):1457-1462. (Clone-specific: Immunohistochemistry). View Reference
  3. DeCaprio JA, Ludlow JW, Figge J, et al. SV40 large tumor antigen forms a specific complex with the product of the retinoblastoma susceptibility gene. Cell. 1988; 54(2):275-283. (Clone-specific: Immunoprecipitation, Western blot). View Reference
  4. Dowdy SF, Hinds PW, Louie K, Reed SI, Arnold A, Weinberg RA. Physical interaction of the retinoblastoma protein with human D cyclins. Cell. 1993; 73(3):499-511. (Clone-specific: Flow cytometry). View Reference
  5. Huang S, Lee WH, Lee EY. A cellular protein that competes with SV40 T antigen for binding to the retinoblastoma gene product. Nature. 1991; 350(6314):160-162. (Clone-specific: Western blot). View Reference
  6. Mittnacht S, Weinberg RA. G1/S phosphorylation of the retinoblastoma protein is associated with an altered affinity for the nuclear compartment. Cell. 1991; 65(3):381-393. (Clone-specific: Fluorescence microscopy). View Reference
  7. Niwa S, Ueno S, Shirasu R. Alteration of pRb expression in the development of rat tongue carcinoma induced by 4-nitroquinoline 1-oxide. Oral Oncol. 2001; 37(7):579-585. (Clone-specific: Immunofluorescence). View Reference
  8. Nork TM, Millecchia LL, Poulsen G. Immunolocalization of the retinoblastoma protein in the human eye and in retinoblastoma. Invest Ophthalmol Vis Sci. 1994; 35(6):2682-2692. (Clone-specific: Immunohistochemistry). View Reference
  9. Riley DJ, Lee EY, Lee WH. The retinoblastoma protein: more than a tumor suppressor. Annu Rev Cell Biol. 1994; 10:1-29. (Biology). View Reference
View All (9) View Less
554136 Rev. 16

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For Research Use Only. Not for use in diagnostic or therapeutic procedures.