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Western Blot Immunodetection minor

Uneven or Irregular Blot Appearance

Symptom
Membrane shows fingerprints, fold marks, or forceps imprints creating irregular patterns. Uneven signal distribution not related to protein bands.
Common Causes
  1. 1 Touching membrane with bare hands transfers oils and proteins
  2. 2 Folding or creasing membrane during handling
  3. 3 Forceps with sharp tips damage or mark membrane
  4. 4 Membrane drying unevenly during incubation
Solutions
  1. 1 Always wear powder-free gloves when handling membranes
  2. 2 Use blunt-end stainless steel forceps for membrane manipulation
  3. 3 Handle membrane gently; avoid folding or creasing at any step
  4. 4 Use sufficient reagent volumes to completely cover membrane during all incubations; ensure membrane remains wet
Related Video (3)
Bilibili (China-Accessible Mirrors) ★ 85
Western blot hands-on: Protein extraction through detection
"Explicitly emphasizes troubleshooting common pitfalls including membrane handling, directly addressing the bare-hand contact failure cause"
Cell Signaling Technology ★ 82
Western Blot Troubleshooting Guide
"Dedicated troubleshooting guide for Western blotting that systematically covers diagnostic problems and solutions including membrane handling artifacts"
Bilibili (China-Accessible Mirrors) ★ 78
Reliable and Reproducible Western Blot Results
"Technical webinar on proper experimental technique for reproducible results, addressing hands-on methodology that prevents contamination and irregular membrane patterns"
Source: sigmaaldrich.com ↗
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