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Essential charged amino acids in the binding of fibronectin to gelatin.


ABSTRACT: The binding of fibronectin to gelatin-agarose was strictly dependent on pH, having a pH optimum of 7-9. The binding was strongly inhibited by increasing ionic strength. A chemical modification of lysyl and arginyl groups of fibronectin abolished the binding activity. The anionic detergents sodium dodecyl sulphate and sodium deoxycholate in concentrations of 10-100mM had the same effect. The binding was not affected by the non-ionic detergents Triton X-100, Tween 20 or Lubrol WX. The results demonstrate an important role of ionic interactions in the binding of fibronectin to gelatin. Absence of inhibition by non-ionic detergents suggests that hydrophobic interactions contribute relatively little to the binding of fibronectin to gelatin.

SUBMITTER: Vuento M 

PROVIDER: S-EPMC1163603 | biostudies-other | 1982 Jan

REPOSITORIES: biostudies-other

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