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.

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

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)

Cell Signaling Technology ★ 90

Western Blot Troubleshooting Guide

"Directly targets troubleshooting Western blot problems, including uneven or irregular blot appearance causes."

Bilibili (China-Accessible Mirrors) ★ 85

Western blot hands-on: Protein extraction through detection

"Emphasizes troubleshooting common pitfalls, likely covering handling steps that prevent membrane contamination."

Bilibili (China-Accessible Mirrors) ★ 80

Western Blot Protocol Beginner Tutorial with Operations

"Beginner tutorial with detailed operational demonstrations, useful for learning proper membrane handling to avoid fingerprints."