Rheology of gastric mucin exhibits a pH-dependent sol-gel transition.

Abstract:

:Gastric mucin, a high molecular weight glycoprotein, is responsible for providing the gel-forming properties and protective function of the gastric mucus layer. Bulk rheology measurements in the linear viscoelastic regime show that gastric mucin undergoes a pH-dependent sol-gel transition from a viscoelastic solution at neutral pH to a soft viscoelastic gel in acidic conditions, with the transition occurring near pH 4. In addition to pH-dependent gelation behavior in this system, further rheological studies under nonlinear deformations reveal shear thinning and an apparent yield stress in this material which are also highly influenced by pH.

journal_name

Biomacromolecules

journal_title

Biomacromolecules

authors

Celli JP,Turner BS,Afdhal NH,Ewoldt RH,McKinley GH,Bansil R,Erramilli S

doi

10.1021/bm0609691

subject

Has Abstract

pub_date

2007-05-01 00:00:00

pages

1580-6

issue

5

eissn

1525-7797

issn

1526-4602

journal_volume

8

pub_type

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