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  • Title: Cloning and expression of Tsaiya duck liver fatty acid binding protein.
    Author: Ko YH, Cheng CH, Shen TF, Ding ST.
    Journal: Poult Sci; 2004 Nov; 83(11):1832-8. PubMed ID: 15554058.
    Abstract:
    Liver basic fatty acid (FA)-binding protein (Lb-FABP) cDNA was cloned from the livers of laying Tsaiya ducks and used to generate probes for quantification of the Lb-FABP mRNA in Tsaiya ducks. The full-length Lb-FABP cDNA of the Tsaiya duck was highly homologous with that of the mallard (99%), chicken (88%), and iguana (73%). The amino acid sequence was also highly homologous to Lb-FABP found in birds and reptiles, indicating a similar function of the Tsaiya duck Lb-FABP to those species. The calculated molecular weight for the cloned duck Lb-FABP was 14,043g/mol. The Lb-FABP was highly expressed in the liver of laying Tsaiya ducks and not detectable in heart, ovary, intestine, or adipose tissues. The expression of Tsaiya duck Lb-FABP in the skeletal muscle was also detected, and the sequence was confirmed. The greater expression of the hepatic Lb-FABP in the egg-laying Tsaiya ducks than the prelaying ducks paralleled the higher FA use by the laying ducks. These results suggest that hepatic Lb-FABP may be needed for egg production when FA metabolism is high for the ducks. Feeding laying Tsaiya ducks with diets enriched with 2% docosahexaenoic acid (DHA) oil for 2 wk significantly increased hepatic DHA content compared with in ducks fed a 2% butter basal diet. There was no effect of dietary DHA enrichment on the expression of Lb-FABP in the liver of Tsaiya ducks. The results suggest that even though the Lb-FABP may be involved in hepatic FA metabolism, the effect of individual FA on liver Lb-FABP in laying Tsaiya ducks needs to be further studied.
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