Abstract:
:cDNAs were molecularly cloned for proteins specifically expressed in embryo as well as in a chemically induced rat pancreatic B cell tumor in which virally related oncogenes such as v-myc, v-src, v-yes, v-mos and v-kis were previously demonstrated not to be expressed. A plasmid cDNA library consisting of 48,000 independent colonies was constructed from poly(A) containing cytoplasmic RNA isolated from 12 day rat embryo. The library was screened by hybridization with 32p-labelled cDNA synthesized from poly(A) containing RNA of rat pancreatic B cell tumor or normal islet B cells. Two clones were obtained which showed a clearly positive reaction only with tumor probe. Nucleotide sequence of one of them harboring insert of 615 nucleotides was determined and its amino acid sequence of 119 residues was deduced, which showed that the protein encoded by this mRNA is highly basic, basic residues/acidic residues being 1.63.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Soma G,Kitahara N,Andoh Tdoi
10.1016/0006-291x(84)90931-8subject
Has Abstractpub_date
1984-10-15 00:00:00pages
164-71issue
1eissn
0006-291Xissn
1090-2104pii
0006-291X(84)90931-8journal_volume
124pub_type
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