Nucleotide sequence analysis of a cloned duck beta-globin cDNA.

The primary structure of the duck beta-globin mRNA was obtained from sequence analysis of the double-stranded in vitro-transcribed DNA cloned in plasma pBR322. The 646-bp long globin DNA insert comprises a coding sequence of 438 bp corresponding to 146 amino acids, a 5'-noncoding region 63 bp long, and a 3'-noncoding region of 113 bp prior to a stretch of adenosine residues. The salient features of each of these regions are discussed and compared with beta-globin mRNAs of other vertebrates.