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  • Title: Molecular cloning of double-stranded cDNA from the eye lens of the frog Rana temporaria: construction of the cDNA clonotheque and identification of a clone containing the nucleotide sequences of the lambda-crystallin gene.
    Author: Tomarev SI, Dolgilevich SM, Kozlov KA, Zinovieva RD, Dzhumagaliev EB, Kogan GL, Skobeleva NA, Mikhailov AT, Frolova LYu, Gause GG.
    Journal: Gene; 1982 Feb; 17(2):131-8. PubMed ID: 7044897.
    Abstract:
    Poly(A)+ RNA from the lens of the frog Rana temporaria contains three components (1200 +/- 50, 1000 +/- 50, and 900 +/- 50 bp in size) and a more heterogeneous RNA species with a length of 650-750 nucleotides. This RNA was used as a template for the AMV reverse transcriptase and Escherichia coli DNA-polymerase I and the total cDNA obtained was cloned in the PstI site of the pBR322 plasmid vector. Recombinant plasmids corresponding to abundant poly(A)+ RNA classes contain cDNA inserts from less than or equal to 200 to 1200 nucleotides in length. Part of the library (clonotheque) was divided into classes differing in the presence of absence of the restriction sites for BamHI, EcoRI and HindIII restriction endonucleases. The clones belonging to each of the five classes were characterized by the hybridization-translation test. The translation product of mRNA hybridizing with the clone pRT(1)294 has an M4 of about 22 000 and is specifically precipitated by the antiserum to lambda-crystallins of Rana temporaria. The size of the cDNA present in pRT(1)294, equal to 580 +/- 20 bp, is sufficient for coding the greater part of the lambda-crystallin amino acid sequence. On the basis of these data, we conclude that the clone pRT(1)294 codes for one of the frog lambda-crystallins.
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