Nucleic Acids Research, 1981, Vol. 9, No. 24 6689-6708
© 1981
MOLECULAR BIOLOGY |
Molecular cloning and analysis of cDNA sequences derived from polyA+ RNA from barley endosperm: identification of B hordein related clones
Biochemistry Department, Rothamsted Experimental Station Harpenden, Herts. AL5 2JQ Cytogenetics Department, Plant Breeding Institute Maris Lane, Trumpington, Cambridge CB2 2LQ, UK
Received November 6, 1981. A collection of over 130 cDNA clones has been constructed in the bacterial plasmids pPH207 and pBR322 using as template the poly A+ RNA from membrane-bound polysomes of barley endosperm (cv. Sundance). Fifty four B hordein cDNA clones have been identified by cross-hybridization analysis and in vitro translation of plasmid-selected mRNAs. Hybridization of TT of the B hordein cDNA clones to Northern blots of sizefractionated RNA indicated that the B hordein mRNA is ca. 1300 nucleotides long. One cDNA clone, pHvE-cl6, has been partially sequenced and shown by comparison with C-terminal and other peptide sequences to be related to Bl hordein polypeptides. The results obtained from the analysis of the B hordein cDNA clones support the idea that the Hor 2 locus, which specifies the B hordeins, is complex and codes for a family of related mRNA species.
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