Cloning of a full length cDNA encoding canine interleukin-4

Primer designed on the basis of the conserved transcription start point (tsp) region of human and bovine gene transcripts, encoding the Interleukin-4 (IL-4), and subsequently the gene specific primer and an adaptor primer pair, was successfully used, to generate the full-length complementary DNA (cDNA) sequence coding for canine IL-4 (cIL-4), from pokeweed mitogen stimulated canine peripheral blood lymphocytes. The full-length cIL-4 contains an open reading frame of 399 nucleotides (nt), with a 5' ends of 66 base pairs (bp) and 3' ends of 125 bp. The nucleotide sequence contains six possible Asn-X-Thr or Asn-X-Ser linked glycosylation sites. Five sequence motifs of TATT or ATTTA, responsible for the regulation of gene expression, are found in the 3' untranslated region.