title: Alternative 5' exons in c-abl mRNA.
abstract: The cellular abl proto-oncogene encodes a protein-tyrosine kinase and is expressed in many cell types in two or three mRNA size species. Four types of mouse c-abl cDNAs have been cloned from 70Z/3 lymphoid cells that have different 5' sequences encoding predicted N-terminal regions of 20-45 amino acids. One of the four cDNAs has a predicted N-terminal sequence of met-gly-gln in common with the gag N terminus of v-abl. The 5' heterogeneity appears to be generated by alternative addition of 5' exons onto a common set of 3' exons. Alternative splicing occurs at the same site at which bcr sequences join to abl sequences in the Philadelphia chromosome translocation.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D005786:Gene Expression Regulation; D005796:Genes; D051379:Mice; D011518:Proto-Oncogene Proteins / Q000235:genetics*; D011519:Proto-Oncogenes; D012323:RNA Processing, Post-Transcriptional; D012326:RNA Splicing; D012333:RNA, Messenger / Q000235:genetics; D014018:Tissue Distribution
chemical_list: D011518:Proto-Oncogene Proteins; D012333:RNA, Messenger