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A regularly spaced and self-revealing protein ladder for anti-tag Western blot analysis

  • Chien Han Kao
  • , Chiu Min Cheng
  • , Kuo Hsiang Chuang
  • , Chih Hung Chuang
  • , Shey Cherng Tzou
  • , Ta Chun Cheng
  • , Yuan Chin Hsieh
  • , Kuang Wen Liao
  • , Yun Ming Wang
  • , Long Sen Chang
  • , Steve R. Roffler
  • , Fang Ming Chen
  • , Tian Lu Cheng

Research output: Contribution to journalArticlepeer-review

Abstract

We designed a protein ladder (hereafter referred to as "Mega- tag") that contains 14 of the most commonly used epitope tags fused to molecular weight markers. The Mega-tag ladder can be simultaneously visualized when anti-tag antibodies are used to detect epitope-tagged recombinant proteins in Western blots. The logarithm of molecular weights and relative mobility of the Mega-tag protein ladder are highly correlated (R2= 0.997 ± 0.00232), indicating that the dye-free Mega-tag protein ladder is accurate. It can also serve as a positive control for anti-epitope tag immunoblots. The Mega-tag protein ladder should provide a convenient and precise tool for Western blot analysis.

Original languageEnglish
Pages (from-to)1-3
Number of pages3
JournalAnalytical Biochemistry
Volume431
Issue number1
DOIs
Publication statusPublished - Dec 1 2012

Keywords

  • 14-Epitope tag protein ladder
  • Anti-epitope tag antibodies
  • Epitope tags
  • Protein molecular estimation
  • Sodium dodecyl sulfate-polyacrylamide gel electrophoresis
  • Western blot analysis

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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