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Western Blot (Detection Problems) severe

No Bands with Recombinant or Overexpressed Protein

Symptom
No bands appear when testing recombinant protein or overexpression lysate, despite expected high protein levels, indicating structural or epitope accessibility issues.
Common Causes
  1. 1 Truncated protein lacking antibody immunogen sequence region
  2. 2 Immunogen located at same end as affinity tag, causing steric blocking of antibody recognition
  3. 3 Incorrect protein amount or antibody dilution range not optimized for recombinant protein
Solutions
  1. 1 Select new antibody with immunogen located in the protein of interest region; contact vendor for immunogen details
  2. 2 Redesign recombinant construct to position immunogen and tag at opposite ends; or use antibody with immunogen distant from tag
  3. 3 Run protein amount panel with wide antibody dilution range to identify optimal detection conditions
Related Video (2)
Cell Signaling Technology ★ 85
Western Blot Troubleshooting Guide
"Directly addresses Western blot troubleshooting including detection problems and no-band scenarios, providing diagnostic guidance for the reported failure."
Bilibili (China-Accessible Mirrors) ★ 78
Western Blot — Full Protocol Walkthrough (Bio-Techne)
"Comprehensive protocol walkthrough covering sample preparation through detection, enabling researcher to identify where truncated protein issues manifest during antibody incubation steps."
Source: abcam.com ↗
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