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. 1982;1(1):53–58. doi: 10.1002/j.1460-2075.1982.tb01123.x

Multiplicity and diversity of cloned zein cDNA sequences and their chromosomal localisation

A Viotti 1,*, D Abildsten 2, N Pogna 3, E Sala 1, V Pirrotta 2
PMCID: PMC552994  PMID: 16453407

Abstract

We have constructed and screened cDNA libraries from total maize endosperm poly(A)+ RNA or from a mRNA fraction enriched in zein sequences. From these libraries we have isolated clones representative of the major classes of zein cDNA sequences and have characterised them by crosshybridisation, by hybrid-selected translation, by in situ hybridisation to maize chromosomes, and hybridisation to genomic Southern blots. We conclude that at least four types of non cross-hybridising zein sequences are present, two coding for light chains and two for heavy chains. At least in the case of the light zeins, there is considerable sequence diversity among the clones which hybridise to each type. Similar results are obtained by translation of the mRNAs selected by each clone. In situ hybridisation shows that the light chain zein genes are located on chromosomes 4, 7, and 10, whilst genes coding for some of the heavy chain zeins are confined to the distal part of the long arm of chromosome 4.

Keywords: in situ hybridisation, zein cDNA clones, Zea mays

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