Revision 1

#12814Store at -20C

1 Kit

(7 x 20 microliters)

Cell Signaling Technology

Orders: 877-616-CELL (2355) [email protected]

Support: 877-678-TECH (8324)

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For Research Use Only. Not for Use in Diagnostic Procedures.
Product Includes Product # Quantity Mol. Wt Isotype/Source
Phospho-C/EBPα (Ser21) Antibody 2841 20 µl 45 kDa Rabbit 
Phospho-C/EBPα (Thr222/226) Antibody 2844 20 µl 30, 42, 45 kDa Rabbit 
C/EBPα (D56F10) XP® Rabbit mAb 8178 20 µl 42, 28 kDa Rabbit IgG
Phospho-C/EBPβ (Thr235) Antibody 3084 20 µl 19 LIP. 36 LAP. 38 LAP. kDa Rabbit 
C/EBPβ (LAP) Antibody 3087 20 µl 35 to 38 mouse LAP. 45 to 49 human LAP. kDa Rabbit 
C/EBPδ Antibody 2318 20 µl 29 kDa Rabbit 
CHOP (D46F1) Rabbit mAb 5554 20 µl 27 kDa Rabbit IgG
Anti-rabbit IgG, HRP-linked Antibody 7074 100 µl Goat 

Please visit cellsignal.com for individual component applications, species cross-reactivity, dilutions, protocols, and additional product information.

Description

The C/EBP Antibody Sampler Kit provides an economical means of evaluating the C/EBP family of transcription factors and several phosphorylation sites that are involved in its activation. The kit includes enough antibody to perform two western blot experiments with each primary antibody.

Storage

Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

Background

CCAAT/enhancer-binding proteins (C/EBPs) are transcription factors critical for cellular differentiation, terminal function, and inflammatory response. Six characterized family members (C/EBPα, β, δ, γ, ε, and ζ) are distributed in a variety of tissues (1). Translation from alternative start codons results in two C/EBPα isoforms (p42 and p30) that are strong transcriptional activators (2). Research studies indicate that insulin and insulin-like growth factor-I stimulate C/EBPα dephosphorylation, which may play a key role in insulin-induced repression of GLUT4 transcription (3). Phosphorylation of C/EBPα at Thr222, Thr226, and Ser230 by GSK-3 may be required for adipogenesis (4). The two forms of C/EBPβ, 38 kDa liver activating protein (LAP) and the 20 kDa liver inhibitory protein (LIP), may result from alternative translation. The 38 kDa LAP protein is a transcriptional activator while LIP may inhibit C/EBPβ transcriptional activity (5). Phosphorylation of C/EBPβ at distinct sites stimulates its transcriptional activity (6-8). Phosphorylation at the rat-specific site Ser105 in C/EBPβ appears essential for C/EBPβ activation in rat (9). C/EBPδ protein is highly expressed in adipose tissue, lung, and intestine (10). Increased expression of C/EBPδ mRNA levels during adipogenesis suggests that C/EBPδ plays an important role in positively regulating adipogenesis (10,11). C/EBPδ is expressed in the mammalian nervous system and plays an important role in long-term memory (10,12). CHOP is a C/EBP-homologous protein that inhibits C/EBP and LAP in a dominant-negative manner (13). CHOP expression is induced by cellular stresses, including starvation; induced CHOP suppresses cell cycle progression from G1 to S phase (14). During ER stress, the level of CHOP expression is elevated and CHOP functions to mediate programmed cell death (15).

  1. Lekstrom-Himes, J. and Xanthopoulos, K.G. (1998) J Biol Chem 273, 28545-8.
  2. Lin, F.T. et al. (1993) Proc Natl Acad Sci U S A 90, 9606-10.
  3. Hemati, N. et al. (1997) J Biol Chem 272, 25913-9.
  4. Ross, S.E. et al. (1999) Mol Cell Biol 19, 8433-41.
  5. Calkhoven, C.F. et al. (2000) Genes Dev 14, 1920-32.
  6. Wegner, M. et al. (1992) Science 256, 370-3.
  7. Trautwein, C. et al. (1993) Nature 364, 544-7.
  8. Nakajima, T. et al. (1993) Proc Natl Acad Sci U S A 90, 2207-11.
  9. Buck, M. et al. (1999) Mol Cell 4, 1087-92.
  10. Ramji, D.P. and Foka, P. (2002) Biochem J 365, 561-75.
  11. Cao, Z. et al. (1991) Genes Dev 5, 1538-52.
  12. Taubenfeld, S.M. et al. (2001) J Neurosci 21, 84-91.
  13. Ron, D. and Habener, J.F. (1992) Genes Dev 6, 439-53.
  14. Barone, M.V. et al. (1994) Genes Dev 8, 453-64.
  15. Zinszner, H. et al. (1998) Genes Dev 12, 982-95.

Background References

    Trademarks and Patents

    Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
    XP is a registered trademark of Cell Signaling Technology, Inc.
    All other trademarks are the property of their respective owners. Visit cellsignal.com/trademarks for more information.

    使用に関する制限

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    Revision 1
    #12814

    C/EBP Antibody Sampler Kit

    C/EBP Antibody Sampler Kit: Image 1 Expand Image
    Western blot analysis of extract from differentiated 3T3-L1 cells, using C/EBPδ Antibody.
    C/EBP Antibody Sampler Kit: Image 2 Expand Image
    Western blot analysis of extracts of COS cells untransfected (lane 1), or transfected with wild-type mouse C/EBPalpha (lane 2), S21A (lane 3), and S21D (lane 4) mutants, using Phospho-C/EBPalpha (Ser21) Antibody (upper) or C/EBPalpha Antibody (lower). (Provided by Dr. Hanna Radomska, Beth Israel Deaconess Medical Center, Boston, MA).
    C/EBP Antibody Sampler Kit: Image 3 Expand Image
    Western blot analysis of extracts from U937 cells treated with either LiCl or NaCl for the indicated times, using Phopho-C/EBPalpha (Thr222/226) Antibody (upper) and C/EBPalpha antibody (lower). C/EBPalpha phosphorylation at Thr222/226 is abolished by the specific GSK3 inhibitor LiCl, but not by NaCl, indicating that phosphorylation at these sites are depends on GSK3 kinase.
    C/EBP Antibody Sampler Kit: Image 4 Expand Image
    Western blot analysis of extracts from adipocytes (differentiated 3T3-L1) treated with insulin for the indicated times, using Phospho-C/EBPbeta (Thr235) Antibody.
    C/EBP Antibody Sampler Kit: Image 5 Expand Image
    Western blot analysis of extracts from COS cells, untransfected or transfected with human or mouse C/EBPbeta (LAP), using C/EBPbeta (LAP) Antibody.
    C/EBP Antibody Sampler Kit: Image 6 Expand Image
    Western blot analysis of extracts from C2C12 cells, untreated or tunicamycin-treated (2 μg/ml, 8 hr), using CHOP (D46F1) Rabbit mAb (upper) or β-Actin Antibody #4967 (lower).
    C/EBP Antibody Sampler Kit: Image 7 Expand Image
    After the primary antibody is bound to the target protein, a complex with HRP-linked secondary antibody is formed. The LumiGLO® is added and emits light during enzyme catalyzed decomposition.
    C/EBP Antibody Sampler Kit: Image 8 Expand Image
    Western blot analysis of extracts from Hep G2 and LNCaP cells using C/EBPα (D56F10) XP® Rabbit mAb.
    C/EBP Antibody Sampler Kit: Image 9 Expand Image
    Western blot analysis of extracts from mouse adipocytes treated with insulin for the indicated times, using Phospho-C/EBPalpha (Ser21) Antibody.
    C/EBP Antibody Sampler Kit: Image 10 Expand Image
    Western blot analysis of extracts from NIH/3T3-L1, differentiated for the indicated times, using C/EBPbeta (LAP) Antibody.
    C/EBP Antibody Sampler Kit: Image 11 Expand Image
    Immunohistochemical analysis of paraffin-embedded mouse lung using C/EBPα (D56F10) XP® Rabbit mAb.
    C/EBP Antibody Sampler Kit: Image 12 Expand Image
    Immunohistochemical analysis of paraffin-embedded cell pellets, THP-1 (left) or Jurkat (right), using C/EBPα (D56F10) XP® Rabbit mAb.
    C/EBP Antibody Sampler Kit: Image 13 Expand Image
    Immunohistochemical analysis of paraffin-embedded human hepatocellular carcinoma using C/EBPα (D56F10) XP® Rabbit mAb in the presence of control peptide (left) or antigen-specific peptide (right).
    C/EBP Antibody Sampler Kit: Image 14 Expand Image
    Immunohistochemical analysis of paraffin-embedded human tonsil using C/EBPα (D56F10) XP® Rabbit mAb.
    C/EBP Antibody Sampler Kit: Image 15 Expand Image
    Confocal immunofluorescent analysis of THP-1 (left) and Jurkat (right) cells using C/EBPα (D56F10) XP® Rabbit mAb (green). Actin filaments were labeled with DY-554 phalloidin (red). Blue pseudocolor = DRAQ5® #4084 (fluorescent DNA dye).
    C/EBP Antibody Sampler Kit: Image 16 Expand Image
    Confocal immunofluorescent analysis of differentiated 3T3-L1 cells using C/EBPα (D56F10) XP® Rabbit mAb (green). Actin filaments were labeled with DY-554 phalloidin (red). Blue pseudocolor = DRAQ5® #4084 (fluorescent DNA dye).
    C/EBP Antibody Sampler Kit: Image 17 Expand Image
    Flow cytometric analysis of THP-1 cells using C/EBP-α (D56F10) XP® Rabbit mAb (blue) compared to concentration-mathced Rabbit (DA1E) mAb IgG XP® Isotype Contol #3900 (red). Anti-rabbit IgG (H+L), F(ab')2 Fragment (Alexa Fluor® 488 Conjugate) #4412 was used as a secondary antibody