Two Elution Mechanisms of MEP Chromatography.

Abstract:

:MEP (mercapto-ethyl-pyridine) HyperCel is one of the hydrophobic charge induction chromatography (HCIC) resins. Under normal operation, proteins are bound to the MEP resin at neutral pH, at which MEP is not charged, mostly via hydrophobic interaction. MEP has a pyridine group, whose pK is 4.8, and hence is positively charged at acidic pH range. Based on the binding mechanism (i.e., hydrophobic interaction) and the induced positive charge at acidic pH, there may be two ways to elute the bound proteins. One way is to bring the pH down to protonate both MEP resin and the bound protein, leading to charge repulsion and thereby elution. Another way is to use hydrophobic interaction modifiers, which are often used in hydrophobic interaction chromatography, to reduce hydrophobic interaction. Here, we summarize such two possible elution approaches.

journal_name

Curr Protein Pept Sci

authors

Arakawa T,Tokunaga M,Maruyama T,Shiraki K

doi

10.2174/1389203718666171117105132

subject

Has Abstract

pub_date

2019-01-01 00:00:00

pages

28-33

issue

1

eissn

1389-2037

issn

1875-5550

pii

CPPS-EPUB-86935

journal_volume

20

pub_type

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