Abstract
Porcine CD4 proximal promoter and enhancer sequences were cloned and aligned with the corresponding human and murine sequences. The alignment showed nucleotide homology between porcine and human sequences was 62.4 % for the CD4 promoter and 56.6 % for the CD4 enhancer. The nucleotide homology between porcine and murine sequences was 42.5 % for the CD4 promoter and 25.4 % for the CD4 enhancer. The proximal enhancer and promoter regions of the CD4 gene from porcine, murine and human cells were compared for their ability to direct foreign gene expression in transiently transfected human cell lines. The results indicated the porcine CD4 promoters and enhancers could effectively direct expression of a foreign gene in human cells. The porcine promoter was equally efficient as CMV and EF-1α in directing gene expression.
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