| Literature DB >> 358198 |
L Villa-Komaroff, A Efstratiadis, S Broome, P Lomedico, R Tizard, S P Naber, W L Chick, W Gilbert.
Abstract
We have cloned double-stranded cDNA copies of a rat preproinsulin messenger RNA in Escherichia coli chi1776, using the unique Pst endonuclease site of plasmid pBR322 that lies in the region encoding amino acids 181-182 of penicillinase. This site was reconstructed by inserting the cDNA with an oligo(dG)-oligo(dC) joining procedure. One of the clones expresses a fused protein bearing both insulin and penicillinase antigenic determinants. The DNA sequence of this plasmid shows that the insulin region is read in phase; a stretch of six glycine residues connects the alanine at position 182 of penicillinase to the fourth amino acid, glutamine, of rat proinsulin.Entities:
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Year: 1978 PMID: 358198 PMCID: PMC392859 DOI: 10.1073/pnas.75.8.3727
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205