ISSN:
1573-4943
Keywords:
Fatty acids
;
binding site
;
β-lactoglobulin
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The interactions of fatty acids with porcine and bovine β-lactoglobulins were measured using tryptophan fluorescence enhancement. In the case of bovine β-lactoglobulin, the apparent binding constants for most of the saturated and unsaturated fatty acids were in the range of 10−7 M at neutralpH. Bovine β-lactoglobulin displays only one high affinity binding site for palmitate with an apparent dissociation constant of 1·10−7 M. The strength of the binding was decreasing in the following way: palmitate 〉 stearate 〉 myristate 〉 arachidate 〉 laurate. Caprylic and capric acids are not bound at all. The affinity of β-lactoglobulin for palmitate decreased as thepH of the incubation medium was lowered and BLG/palmitate complex was not observed atpH's lower than 4.5. Surprisingly, chemically modified bovine β-lactoglobulin and porcine β-lactoglobulin did not bind fatty acids in the applied conditions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01025044
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