Application of dye-ligands affinity adsorbent in capturing of rabbit immunoglobulin G

Rattana Wongchuphan, Beng Ti Tey, Wen Siang Tan, Farah Saleena Taip, Siti Mazlina Mustapa Kamal, Tau Chuan Ling

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The applicability of dye-ligands attached to an expanded bed chromatography quartz base matrix (Streamline™) for the affinity bioseparation of rabbit immunoglobulin G (IgG) was investigated. Reactive Green 5 (RG-5) immobilized onto adsorbent was selected for capturing of rabbit-IgG due to its higher binding capacity compared to other dye-ligands possessing similar ligand density. Adsorption parameters such as pH, temperature, ionic strength and initial rabbit-IgG concentration were optimized for the adsorption of rabbit-IgG on the RG-5-immobilized adsorbent. The highest rabbit-IgG adsorption was recorded in pH 7.0, while the maximum binding capacity for BSA was achieved at pH 4.0. The adsorption of rabbit-IgG on RG-5-immobilized adsorbent was declined as the increase of ionic strength. There is no significant influence of temperature against adsorption efficiency of RG-5-immobilized adsorbent for rabbit-IgG. The adsorption phenomenon of rabbit-IgG on RG-5-immobilized adsorbent appeared to follow the Langmuir-Freundlich adsorption isotherm model. The theoretically maximum binding capacity (qm) of RG-5-immobilized adsorbent estimated from this isotherm was 49.3 mg ml-1, which is very close to that obtained experimentally (49.0 mg ml-1). About 50% of bound BSA on RG-5-immobilized adsorbent in binary adsorption system was removed with washing buffer containing 1 M NaCl.

Original languageEnglish
Pages (from-to)232-238
Number of pages7
JournalBiochemical Engineering Journal
Issue number3
Publication statusPublished - 15 Aug 2009
Externally publishedYes


  • Adsorption
  • Affinity
  • Bioseparation
  • Dye-ligand
  • Expanded bed chromatography
  • Immunoglobulin G purification

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