title: A novel CD28 mRNA variant and simultaneous presence of various CD28 mRNA isoforms in human T lymphocytes.
abstract: The primary transcript of the human CD28 gene in T lymphocytes, encoding for a costimulatory molecule, is known to undergo alternative splicing, and different small sets of variant isoforms have been reported. This report presents the novel simultaneous presence of eight different mRNA isoforms, all observed together in normal human T cells; this is an interesting finding in the study of CD28 mRNA structural variants. A similar pattern was found in a total of four individuals. In addition, we also report the occurence and sequence of a new CD28 mRNA isoform, one of the above eight, which is a novel variant generated by the use of a new combination of splice donor and acceptor sites.
authors.affiliation: National Centre for Cell Science, Ganeshkhind, Pune, India. manisha_desh@hotmail.com
authors.forename: Manisha
authors.initials: M
authors.lastname: Deshpande
authors.forename: K
authors.initials: K
authors.lastname: Venuprasad
authors.forename: Pradeep B
authors.initials: PB
authors.lastname: Parab
authors.forename: Bhaskar
authors.initials: B
authors.lastname: Saha
authors.forename: Debashis
authors.initials: D
authors.lastname: Mitra
mesh_terms: D017398:Alternative Splicing; D000940:Antigenic Variation; D001483:Base Sequence; D018106:CD28 Antigens / Q000235:genetics*; D017931:DNA Primers / Q000235:genetics; D006801:Humans; D008969:Molecular Sequence Data; D020033:Protein Isoforms / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D018106:CD28 Antigens; D017931:DNA Primers; D020033:Protein Isoforms; D012333:RNA, Messenger