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Molecular Biology Commons

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Genetics

Zoology and genetics

1991

Articles 1 - 2 of 2

Full-Text Articles in Molecular Biology

Study Of En At The Wx-844 Allele: Modifier Of En Excision, Weak En, And Transposition Of En , Sudhansu Dash Jan 1991

Study Of En At The Wx-844 Allele: Modifier Of En Excision, Weak En, And Transposition Of En , Sudhansu Dash

Retrospective Theses and Dissertations

The wx-844 allele contains a fully active and complete En transposable element inserted within the Wx gene. The mutability of this allele is very high and the somatic mutability is seen in the endosperm as dark staining Wx sectors in a background of non-staining wx regions;The very high coarse pattern of waxy mutability is modified into a reduced fine pattern in the presence of the I-102 element located within the A gene in the non-autonomously mutable a-m(r) 102 allele. The modifying effect of the I-102 element on En induced excision has been found to be a general phenomenon ...


Analysis Of Three Plasmids From Filamentous, Nitrogen-Fixing Cyanobacteria , Douglas Kevin Walton Jan 1991

Analysis Of Three Plasmids From Filamentous, Nitrogen-Fixing Cyanobacteria , Douglas Kevin Walton

Retrospective Theses and Dissertations

The cyanobacteria are an ancient and diverse group of prokaryotes capable of oxygenic photosynthesis. They display both unicellular and filamentous cell types and some have the ability to fix atmospheric dinitrogen, and the ability to differentiate specialized cells. In addition, many of the cyanobacteria possess plasmids. To date, only one plasmid, from a unicellular non-nitrogen-fixer, has been characterized in detail. The current lack of information concerning cyanobacterial plasmids, and their subsequent use as vectors, has hindered genetic analysis, particularly in the filamentous species;In this study, the properties of two plasmids and one plasmid origin of replication from filamentous, nitrogen-fixing ...