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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Structure of the bovine lactoferrin-encoding gene and its promoter.

Lactoferrin ( Lf), a ferric ion (Fe3+)-binding glycoprotein, is found most notably in milk, probably to mediate protection against microbial infection of the mammary gland. Based on an initial isolation and sequencing of a complete cDNA of the bovine Lf gene (bLf), the complete gene was obtained from genomic libraries on five overlapping phage lambda EMBL3 clones. A detailed restriction map and the complete exon/intron structure of the gene are presented, together with 1 kb of sequence data of the promoter upstream from the proximal exon. The coding sequence is dispersed over 17 exons spanning 34.5 kb of genomic DNA. While the exons are of similar size, as in other members of the transferrin gene family (Tf), some of the intron sizes are very different. Evolutionary conservation of both exon sizes and their contribution to the various domains of the protein molecule add to the evidence that Lf originated via an internal sequence duplication. The promoter sequence lacks some of the sequence motifs for transcriptional enhancers found in the promoters of human and mouse Lf, suggesting a potential reason for the relatively weak expression of bLf.[1]


  1. Structure of the bovine lactoferrin-encoding gene and its promoter. Seyfert, H.M., Tuckoricz, A., Interthal, H., Koczan, D., Hobom, G. Gene (1994) [Pubmed]
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