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/lp/allen-press/binding-properties-and-immunolocalization-of-a-fatty-acid-binding-5QkzMjQzXJ
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- Publisher
- Allen Press
- Copyright
- American Society of Parasitologists
- Subject
- MOLECULAR-CELL BIOLOGY
- ISSN
- 0022-3395
- eISSN
- 1937-2345
- DOI
- 10.1645/GE-3352
- pmid
- 15986602
- Publisher site
- See Article on Publisher Site
Abstract
We describe here a fatty acid–binding protein (FABP) isolated and purified from the parasitic protozoon Giardia lamblia. The protein has a molecular mass of 8 kDa and an isoelectric point of 4.96. A Scatchard analysis of the data at equilibrium revealed a dissociation constant of 3.12 × 10−8 M when the labeled oleic acid was displaced by a 10-fold greater concentration of unlabeled oleic acid. Testosterone, sodium desoxycholate, taurocholate, metronidazol, and α-tocopherol, together with butyric, arachidonic, palmitic, retinoic, and glycocholic acids, were also bound to the protein. Assays with polyclonal antibodies revealed that the protein is located in the ventral disk and also appears in the dorsal membrane, the cytoplasm, and in the vicinity of the lipid vacuoles.
Journal
The Journal of Parasitology – Allen Press
Published: Apr 20, 2005