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
Biomacromoleculesjournal_title
Biomacromoleculesauthors
Celli JP,Turner BS,Afdhal NH,Ewoldt RH,McKinley GH,Bansil R,Erramilli Sdoi
10.1021/bm0609691subject
Has Abstractpub_date
2007-05-01 00:00:00pages
1580-6issue
5eissn
1525-7797issn
1526-4602journal_volume
8pub_type
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