title: Chromosomal arrangement of the duck alpha-globin genes and primary structure of the embryonic alpha-globin gene pi.
abstract: A recombinant lambda Charon 4A bacteriophage, D alpha G-1, carrying the genes coding for the duck embryonic (pi') and adult (alpha A, alpha D) alpha-like globins was isolated from a previously constructed duck DNA recombinant library. The three globin genes are transcribed from the same DNA strand and are arranged in the order of their expression during development: 5'-pi'-alpha D-alpha A-3'. We have determined the complete nucleotide sequence of the duck pi'-globin gene, including the flanking regions. Due to the unusual length of intron 1 (963 bp) and intron 2 (568 bp) the 2167-bp duck pi'-globin gene is by far the largest among all known mammalian or avian alpha- and beta-globin genes. For instance, the duck pi'-globin gene introns are almost twice as long as those of the chicken pi'-globin genes. A surprisingly high degree of nucleotide sequence homology (88%) has been found for the 5' flanking region (positions -1 to -223) of the duck and chicken pi'-globin gene.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002645:Chickens / Q000235:genetics; D002874:Chromosome Mapping; D003001:Cloning, Molecular; D004274:DNA, Recombinant; D004372:Ducks / Q000196:embryology / Q000235:genetics*; D005796:Genes; D005914:Globins / Q000235:genetics*; D013045:Species Specificity
chemical_list: D004274:DNA, Recombinant; D005914:Globins