Abstract
A cDNA library was prepared from a terminal deoxynucleotidyltransferase-containing thymoma in the lambda phage vector lambda gt11. By screening plaques with anti-terminal transferase antibody, positive clones were identified of which some had beta-galactosidase-cDNA fusion proteins identifiable after electrophoretic fractionation by immunoblotting with anti-terminal transferase antibody. The predominant class of cross-hybridizing clones was determined to represent cDNA for terminal transferase by showing that one representative clone hybridized to a 2200-nucleotide mRNA in close-matched enzyme-positive but not to enzyme-negative cells and that the cDNA selected a mRNA that translated to give a protein of the size and antigenic characteristics of terminal transferase. Only a small amount of genomic DNA hybridized to the longest available clone, indicating that the sequence is virtually unique in the mouse genome.
MeSH Terms
Animals
Antibodies
Antigen-Antibody Complex
Bacteriophage lambda/genetics
Cloning, Molecular
DNA/metabolism
DNA Nucleotidylexotransferase/analysis,genetics
DNA Nucleotidyltransferases/genetics
Escherichia coli/genetics
Genetic Vectors
Mice
Nucleic Acid Hybridization
Protein Biosynthesis
RNA, Messenger/genetics
Thymoma/enzymology
Thymus Neoplasms/enzymology
beta-Galactosidase/genetics
Chemicals
Antibodies
Antigen-Antibody Complex
RNA, Messenger
DNA
DNA Nucleotidyltransferases
DNA Nucleotidylexotransferase
beta-Galactosidase
Authors & Affiliations
6 authors, click to expand affiliations / ORCID
Landau N R
St John T P
Weissman I L
Wolf S C
Silverstone A E
Baltimore D
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28 references, click to expand
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