title: Transposable genetic element found in the 5'-flanking region of the fibroin H-chain gene in a genomic clone from the silkworm Bombyx mori.
abstract: A transposable genetic element was found in the 5'-flanking region of the fibroin H-chain gene in one of the genomic clones from the silkworm Bombyx mori. This element, named K-1.4, is about 1 X 4 X 10(3) base-pairs long, contains an open reading frame of only 225 base-pairs and has inverted repeats of 12 base-pairs at both ends. Duplication of three base-pairs seems to have occurred when this element was integrated into the silkworm genome. About 15 copies of K-1.4 are present per haploid genome of various silkworm strains. Genomic loci of some of these elements are different among different strains or even among individual offspring of the same parents. K-1.4 is present also in the genome of Bombyx mandarina. The K-1.4-related sequences are present in some species belonging to the family Saturniidae.
mesh_terms: D000818:Animals; D001483:Base Sequence; D012831:Bombyx; D003001:Cloning, Molecular; D004247:DNA; D004262:DNA Restriction Enzymes; D004251:DNA Transposable Elements; D005349:Fibroins / Q000235:genetics*; D005796:Genes; D009693:Nucleic Acid Hybridization; D011110:Polymorphism, Genetic
chemical_list: D004251:DNA Transposable Elements; D004247:DNA; D005349:Fibroins; D004262:DNA Restriction Enzymes