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Western Blot, Protein Expression & Signaling

Characterize protein expression, phosphorylation, degradation, cleavage and pathway responses using traditional Western blotting and automated capillary Western.

EnquBio is a San Diego-based CRO providing ProteinSimple Jess (Simple Western) automated capillary Western and traditional Western blot services for discovery, pharmacology and translational studies. EnquBio is a Bio-Techne Certified Service Provider for Jess — one of only two in North America — combining certified Simple Western expertise with conventional Western flexibility.

Bio-Techne Certified Service Provider — Jess (Simple Western) · View listing
Western blot and automated capillary Western protein analysis

What We Can Evaluate

Protein-level readouts for expression, signaling and targeted protein degradation studies.

Expression

Total Protein Expression

Measure treatment-, genotype- or disease-associated changes in target protein abundance.

Signaling

Phosphoprotein Signaling

Evaluate pathway activation and inhibition using phospho- and total-protein readouts.

TPD

Protein Degradation

Confirm target loss and quantify concentration- and time-dependent degradation.

Processing

Cleavage & Processing

Assess treatment-associated protein processing, cleavage products and related molecular changes.

Identity

Molecular-Weight Confirmation

Evaluate target signal at the expected molecular weight and distinguish additional protein species.

Mechanism

Pathway Modulation

Connect changes in target expression or phosphorylation with downstream mechanism-of-action responses.

Two Complementary Western Approaches

We select the format based on target biology, sample availability, throughput and study objectives.

Traditional Western Blot

Gel electrophoresis + membrane-based immunodetection

A flexible format for custom and exploratory protein studies where direct inspection of band patterns is valuable.

  • Broad antibody flexibility
  • Direct band visualization
  • Molecular-weight-resolved target assessment
  • Phosphoprotein and total-protein analysis
  • Protein degradation, cleavage and processing studies
  • Useful for assay development and troubleshooting

ProteinSimple Jess (Simple Western)

Automated capillary Western (Simple Western) — size-based separation and immunodetection

Simple Western technology on Jess automates sample separation, immunoprobing, washing, detection and data analysis in capillaries for quantitative, reproducible protein measurement. As a Bio-Techne Certified Service Provider, our team is trained and certified directly by ProteinSimple field application scientists.

  • Automated size-based Western workflow
  • Quantitative peak-based data analysis
  • Reduced hands-on processing
  • Lower sample consumption than conventional Western workflows
  • Chemiluminescent and fluorescent detection options
  • Supports phospho/total and sequential RePlex workflows

Choosing the Right Western Format

Both approaches provide molecular-weight-resolved protein information, but their practical strengths differ.

Study ConsiderationTraditional WesternJess (Simple Western)
Protein separationSDS-PAGECapillary electrophoresis
Detection formatMembrane-based immunoblotAutomated capillary immunodetection
Primary readoutBandsElectropherogram / quantitative peaks
Sample consumptionStandard Western workflowLower-volume capillary format
Hands-on processingHigherLower / automated
Best fitCustom, exploratory and troubleshooting studiesStandardized quantitative and higher-throughput workflows

Phosphoprotein & Cell Signaling Analysis

Measure pathway activation, inhibition and downstream pharmacodynamic responses at the protein level.

Phospho + total protein readouts

Western blotting can distinguish phosphorylated and total forms of pathway proteins while retaining molecular-weight information, making it useful for confirming signaling responses and treatment mechanisms.

pERK / ERKpAKT / AKTpSTAT / STATpSMAD / SMADp38NF-κB Pathways
Pathway ActivationConfirm stimulation-induced phosphorylation responses.
Pathway InhibitionMeasure suppression of signaling following compound treatment.
Pharmacodynamic ResponseCompare protein signaling across dose, time and treatment conditions.
Mechanism of ActionConnect target modulation to downstream signaling consequences.
Targeted Protein Degradation

PROTAC & Degrader Support

Western blotting provides direct, molecular-weight-resolved confirmation of target protein loss and is a core analytical tool for targeted protein degradation programs. EnquBio supports concentration-response, time-course, washout and mechanistic studies using both traditional Western blotting and automated capillary Western.

Targeted protein degradation and PROTAC study
Target DegradationConfirm loss of the intended target protein.
DC50 / DmaxCharacterize degradation across compound concentrations.
Time CourseMeasure onset and duration of target depletion.
Washout & RecoveryEvaluate protein recovery after compound removal.
SelectivityCompare target degradation with related proteins or pathway controls.
Downstream SignalingLink degradation to functional pathway consequences.

Applications

Western-based protein analysis can support a broad range of discovery and translational programs.

Target Validation

Confirm protein expression and target modulation in relevant biological models.

Mechanism of Action

Connect treatment to target abundance, phosphorylation and downstream pathway effects.

Compound Profiling

Compare concentration- and time-dependent protein responses across test compounds.

Biomarker Confirmation

Validate protein-level changes identified through gene-expression or functional studies.

Protein Processing

Assess cleavage, degradation and additional molecular-weight-resolved protein species.

Translational Pharmacology

Integrate protein-level endpoints with ex vivo and in vivo study readouts.

Sample Types

Protein extraction and assay conditions are optimized according to sample type, target abundance and study design.

Cell Lysates
Tissue Lysates
Tumor Lysates
PBMC / Immune Cell Lysates
Engineered Cell Models
Other Protein Extracts

How We Design a Protein Study

The Western format is selected around the scientific question and required level of characterization.

01

Define the Question

Expression, phosphorylation, degradation, processing or pathway response.

02

Select the Format

Traditional Western or automated capillary Western based on study needs.

03

Optimize the Assay

Establish antibody conditions, sample loading and appropriate controls.

04

Quantify & Interpret

Analyze protein responses alongside treatment, dose, time and other pharmacology endpoints.

Frequently Asked Questions

What is the difference between Jess (Simple Western) and traditional Western blot?
Both provide molecular-weight-resolved protein detection. Jess runs the entire Western workflow — separation, immunoprobing, washing and detection — automatically inside capillaries, producing quantitative peak-based data with lower sample input and higher reproducibility. Traditional Western blotting offers broader antibody flexibility and direct band visualization, and remains valuable for custom, exploratory and troubleshooting studies.

How much sample does Jess require?
Jess typically consumes about 3 µL of prepared lysate per capillary data point — far less than a conventional Western workflow — making it well suited to limited primary cells, in vivo study samples and other precious material.

Can Jess measure phosphorylated and total protein from the same sample?
Yes. Phospho- and total-protein readouts can be generated from the same lysate, including sequential RePlex workflows, enabling normalized phospho/total ratios for pathway activation and inhibition analysis.

Can Western blot studies for PROTAC and degrader programs be outsourced?
Yes. EnquBio runs concentration-response (DC50/Dmax), time-course, washout and selectivity studies for targeted protein degradation programs using Jess and traditional Western blotting, delivering quantified data with a complete study report.

Is EnquBio certified to run Jess?
Yes. EnquBio is a Bio-Techne Certified Service Provider for Jess (Simple Western), listed in Bio-Techne’s official certified service provider directory — one of only two providers in North America.

Need a protein-level answer?

Send us your target, sample type and study objective. Our scientists can recommend the appropriate Western format and study design.

Contact Our Scientists →
Bio-Techne Certified Service Provider — Jess (Simple Western)
Protein expression, phosphorylation and degradation
PROTAC and targeted protein degradation support