title: [Analysis of the 5'-region of bovine lactoferrin gene].
abstract: To detect DNA variation of bovine lactoferrin gene, the sequence of 5'-regulatory region has been studied by PCR-SSCP. Among the five sub-sequences of this region, Blf 5'-1(227bp),Blf 5'-3(175bp) and Blf 5'-5(293bp)were found to be polymorphic. After sequencing the Blf 5'-1, G-->A and T-->G transitions were identified at the sites of -926 and -915 respectively. In the Blf 5'-3 fragment, a G insertion at -478 was found. Transversions of C-->A, G-->C at -28 and +33 respectively were also detected in the Blf 5'-5 region. The frequencies of mutated alleles were 0.101,0.112 and 0.237, respectively, in the three regions. By applying an analysis tool of TFSEARCH ver1.3, we studied the potential elements and protein factors which bind to the 5' -region, and discovered the different regulatory elements of pre-mutation and post-mutation.
authors.affiliation: College of Animal Science and Technology, China Agricultural University, Beijing, 100094 China. g_h_li@hotmail.com
authors.forename: Guo-Hua
authors.initials: GH
authors.lastname: Li
authors.forename: Yuan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Dong-Xiao
authors.initials: DX
authors.lastname: Sun
authors.forename: Ning
authors.initials: N
authors.lastname: Li
mesh_terms: D024506:5' Flanking Region / Q000235:genetics*; D000483:Alleles; D000818:Animals; D001483:Base Sequence; D002417:Cattle / Q000235:genetics*; D007781:Lactoferrin / Q000235:genetics*; D008969:Molecular Sequence Data; D016254:Mutagenesis, Insertional; D017354:Point Mutation; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D018807:Polymorphism, Single-Stranded Conformational; D050436:Regulatory Elements, Transcriptional / Q000235:genetics; D014157:Transcription Factors / Q000235:genetics
chemical_list: D014157:Transcription Factors; D007781:Lactoferrin