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CEBPD · Western blot design guide
Design a Western Blot for CEBPD
Real validated CEBPD Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-CEBPD WB antibodies. Everything you need to plan the experiment before you commit precious samples.
Last reviewed: May 2026 · Scientific review: Boster Bio technical team
CEBPD Western Blot Experimental Design Guide
Expected bands, validated protocols, controls and antibodies — the at-a-glance facts below, then the full design guide.
Must know before running
| Expected band | ~28.5 kDa | |
| Observed band | ~36 kDa | |
| Gel | 12–15% | |
| Negative control | siRNA / KO lysate |
Important caveats
Reasons your observed band may differ from the expected size.
| PTM | Acetylated + Ubiquitinated | |
| Caveat | Ubiquitin conjugation | |
| Regulation | TNFα up | |
| Isoform | 1 isoform(s) |
Section 1
Real Curated CEBPD Western Blot Protocols
Literature-validated Western blot parameters for CEBPD — gel percentage, transfer, blocking, antibody incubation and detection, extracted from published methods.
| Sample / lysate | human A549 , Lane 2: human placenta , Lane 3: human U87 , Lane 4: mouse RAW264.7 . After Electrophoresis, proteins were transferred to a Nitrocellulose membrane at 150mA for 50-90 minutes. Blocked the membrane with 5% Non-fat Milk/ TBS for 1.5 hour at RT. The membrane was incubated with rabbit anti-CEBP Delta/CEBPD antigen affinity purified polyclonal antibody (Catalog # A03499-4) at 0.5 μg/mL overnight at 4°C, then washed with TBS-0.1%Tween 3 times with 5 minutes each and probed with a goat anti-rabbit IgG-HRP secondary antibody at a dilution of 1:5000 for 1.5 hour at RT. The signal is developed using an Enhanced Chemiluminescent detection (ECL) kit (Catalog # EK1002) with Tanon 5200 system. A specific band was detected for CEBP Delta/CEBPD at approximately 36KD. The expected band size for CEBP Delta/CEBPD is at 36KD |
| Gel % | 12–15% |
| Load | 50ug |
| Transfer | nitrocellulose membrane, 150 mA, 50–90 min |
| Membrane | nitrocellulose |
| Blocking | 5% non-fat milk / TBS, 1.5 h RT |
| Primary antibody | 0.5 µg/mL |
| Primary incubation | overnight at 4 °C |
| Secondary antibody | goat anti-rabbit IgG-HRP, 1:5000 |
| Wash | TBS-0.1% Tween, 3 × 5 min |
| Detection | ECL |
| Exposure / imaging | Tanon 5200 |
| Observed band | 36 kDa |
Section 2
What Is the Expected CEBPD Western Blot Band Size?
CEBPD's 28.5 kDa calculated mass runs empirically at ~36 kDa on Western blot, a shift not attributable to glycosylation, cleavage, or disulfide bonds, possibly reflecting residual dimer complexes.
| single band around 36 kDa | full-length CEBPD monomer, migrating above its 28.5 kDa calculated mass on SDS-PAGE |
| no additional bands from alternative splicing | UniProt annotates only one CEBPD isoform, so extra bands are not expected from splice variants |
| no lower-molecular-weight cleaved fragment | CEBPD has no annotated signal peptide or propeptide, so the full-length protein is detected without a smaller mature form |
| no glycosylation-associated smear or upward shift | CEBPD has zero annotated glycosylation sites, so mobility differences are not caused by glycan heterogeneity |
| faint higher-molecular-weight species near double the monomer mass | may reflect homodimer or CEBPB/CEBPA/CEBPE heterodimer complexes formed through the annotated DNA-binding dimerization interface, most apparent under incomplete denaturation |
💡Expected CEBPD appearanceExpect a single band at approximately 36 kDa for full-length CEBPD, running above its calculated 28.5 kDa mass despite no annotated glycosylation, cleavage, or disulfide linkage.
| predicted mass (28.5 kDa, 269 aa) | baseline calculated mass from the sequence before any modification or migration effects |
| empirical observed band (~36 kDa) | the actual apparent molecular weight seen on reducing SDS-PAGE, roughly 7.5 kDa above the calculated mass |
| N-terminal acetylation (N-acetylserine, position 2) | minor covalent modification adding negligible mass, not sufficient to account for the observed size shift |
| homodimer/heterodimer formation (with CEBPB, CEBPA, CEBPE) | non-covalent dimerization through the DNA-binding interface can produce a higher-molecular-weight species near twice the monomer mass if dimers are not fully dissociated before loading |
| single annotated isoform | no alternative splice forms are expected to generate additional bands |
| absence of signal peptide or propeptide | no proteolytic maturation step, so no smaller cleaved fragment is expected below the full-length band |
| Situation | Likely cause | Next action |
|---|---|---|
| Band higher than expected | CEBPD consistently migrates above its 28.5 kDa calculated mass, appearing near 36 kDa, and residual homodimer/heterodimer complexes can add a further higher-molecular-weight species | confirm the band matches the ~36 kDa observed size, use fully reducing/denaturing sample buffer, and boil samples longer to dissociate residual dimer |
| No band in lysate | CEBPD is a nuclear transcription factor, so standard whole-cell lysis protocols that under-extract nuclear proteins can yield insufficient signal | use a nuclear extraction or high-salt lysis buffer with adequate sonication to ensure nuclear protein solubilization before loading |
| Multiple bands | co-migrating CEBPB, CEBPA, or CEBPE heterodimer partners, or antibody cross-reactivity with related CEBP family members, can appear as extra bands | include positive and negative control lysates and compare against the known ~36 kDa CEBPD band to distinguish specific signal from cross-reactivity |
| Band lower than expected | with no annotated cleavage site, a lower band most likely reflects proteolytic degradation during lysate preparation rather than natural processing | add fresh protease inhibitors and keep samples cold throughout lysis and handling to minimize degradation |
| Weak or no signal | CEBPD is an inducible transcription factor expressed at low basal levels in many unstimulated cell types | use a stimulus known to induce CEBPD expression and load sufficient nuclear protein per lane to boost detectable signal |
| Fragments below expected size | non-specific proteolysis during extraction can generate faster-migrating fragments even though no natural cleavage step is annotated | use a fresh protease inhibitor cocktail and minimize freeze-thaw cycles of lysates before loading |
Experiment evidence
Western blot images showing CEBPD band
A03499-4 · CEBPD
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for CEBPD Western blot
🧪For positive controls for CEBPD in Western blot, you can use a cell line stimulated with a known CEBPD inducer (e.g., an inflammatory or ER-stress agent), since no Human Protein Atlas tissue expression data is available for this gene.
Positive control: Stimulus-induced cell line
Negative control: ubiquitously expressed; use siRNA knockdown or KO line
Loading controls: Also probe GAPDH and β-actin as loading controls alongside a total-protein stain such as stain-free gel imaging, Ponceau S, or REVERT.
⚠️Feasibility: As a nuclear transcription factor with no HPA tissue data to guide tissue selection, confirm antibody specificity using an inducing stimulus for the positive signal and siRNA/CRISPR knockdown as the negative control rather than relying on a naturally negative tissue.
Comprehensive Human Protein Atlas IHC scoring per tissue. Rows are taken directly from the HPA tissue chart — click any row's HPA link to view the source.
Positive expression · recommended positive controls
| Tissue | Cell type | Level | Evidence | Source |
|---|
Undetected expression · recommended negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|
Section 3
Advanced CEBPD Western Blot Tips
Deeper troubleshooting and optimisation questions for CEBPD, answered from its protein features.
Why does CEBPD migrate near 36 kDa instead of 28.5 kDa?
CEBPD's predicted mass is 28.5 kDa, but SDS-PAGE mobility is influenced by acetylation and an isopeptide-linked (ubiquitin-like) modification, both annotated for this protein, which add mass and alter charge. Its proline- and basic-residue-rich transactivation domain also causes anomalous migration on standard Tris-glycine gels. Together these explain why CEBPD is commonly detected near 36 kDa rather than at its calculated molecular weight; treat this as the expected pattern, not a specificity problem.
Could multiple bands indicate CEBPD isoforms?
UniProt annotates only a single CEBPD isoform, so extra bands are not alternative isoforms. Instead consider differential acetylation or isopeptide (SUMO/ubiquitin-like) modification states, incompletely denatured homodimers or heterodimers with CEBPB, CEBPA, CEBPE, or SPI1, or proteolytic degradation. Compare lysates prepared with fresh reducing sample buffer and full boiling before concluding a band is nonspecific.
What induces CEBPD expression before blotting?
CEBPD is a stress- and inflammation-responsive transcriptional activator with generally low basal expression. Stimulate cells with IL-6, IL-1beta, LPS, or serum/growth factors before harvesting lysate, since untreated or resting cells often give weak or undetectable signal. Include an induced sample alongside untreated controls to confirm antibody specificity and expected up-regulation.
How do acetylation and SUMOylation affect CEBPD detection?
CEBPD carries an annotated acetylation site and an isopeptide-bond (ubiquitin-like/SUMO) modification site. These additions increase apparent mass and can produce a secondary, slower-migrating band above the main species. If band patterns shift between conditions, compare stimulated versus unstimulated lysates rather than assuming degradation or nonspecific binding.
Best blocking buffer for CEBPD antibody detection?
CEBPD is a nuclear DNA-binding transcription factor closely related to other C/EBP family members, so cross-reactivity is a common background issue. Use 5% BSA instead of milk, which contains phosphoproteins that can interfere with antibody binding, and extend blocking time to reduce nonspecific signal around the 28-36 kDa region.
What transfer method to use for CEBPD Western blot?
CEBPD is a small (~28.5 kDa) nuclear protein, so use a 10-12% polyacrylamide gel to resolve it from similarly sized C/EBP paralogs. Transfer at lower voltage for a shorter time, or use semi-dry transfer, to avoid blow-through onto a 0.2 micron pore PVDF or nitrocellulose membrane.
How to normalize CEBPD signal for quantitation?
Because CEBPD is nuclear and inducible under stress or cytokine stimulation, normalize to a nuclear marker such as Lamin B1 or Histone H3 rather than GAPDH or actin. This avoids confounds from cytoplasmic contamination during nuclear extraction and gives a more accurate baseline when comparing induced versus uninduced samples.
Boster reagents
Best CEBPD Western Blot Antibodies
BosterBio's CEBPD antibodies are among the best-performing WB antibodies on the market — well cited, thoroughly validated, and orthogonally cross-validated against negative tissues and complementary methods.
Real WB data
Anti-CEBP Delta/CEBPD Antibody Picoband®
Cat # A03499-4
For CEBPD detection, Boster's A03499-4 anti-CEBP Delta antibody stands out as the top-performing choice, backed by extensive citation history and rigorous validation, including confirmed specificity in western blot with orthogonal cross-checks against negative tissue controls and complementary detection methods for reliable, reproducible results.
Which to pick: Only one CEBPD antibody is catalogued here: A03499-4. It comes with an actual western blot validation image (SDS-PAGE, 5-20% gel), making it the clear default pick for your CEBPD WB experiments since no alternative SKUs are currently listed.
Source: BosterBio CEBPD gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.
References
- UniProt Consortium. UniProt entry P49716.
- Human Protein Atlas. CEBPD tissue expression.