Structural organization of a src gene from Xenopus laevis.

By sequence analysis of genomic clones, the exon-intron structure of one of the two src genes from Xenopus laevis has been determined. The coding region of the gene is interrupted by 10 introns whose locations are identical to the introns in the coding regions of the src genes of human and chicken. The 5' untranslated region is contained on a separate exon with no sequence conservation relative to the corresponding region of the chicken gene.