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Full-Text Articles in Molecular Biology
Ether Bridge Formation And Chemical Diversification In Loline Alkaloid Biosynthesis, Juan Pan
Ether Bridge Formation And Chemical Diversification In Loline Alkaloid Biosynthesis, Juan Pan
Theses and Dissertations--Plant Pathology
Loline alkaloids, found in many grass-Epichloë symbiota, are toxic or feeding deterrent to invertebrates. The loline alkaloids all share a saturated pyrrolizidine ring with a 1-amine group and an ether bridge linking C2 and C7. The steps in biosynthesis of loline alkaloids are catalyzed by enzymes encoded by a gene cluster, designated LOL, in the Epichloë genome. This dissertation addresses the enzymatic, genetic and evolutionary basis for diversification of these alkaloids, focusing on ether bridge formation and the subsequent modifications of the 1-amine to form different loline alkaloids.
Through gene complementation of a natural lolO mutant and comparison …
The Role Of Polyadenylation In Seed Germination, Liuyin Ma
The Role Of Polyadenylation In Seed Germination, Liuyin Ma
Theses and Dissertations--Plant and Soil Sciences
Seed germination has many impacts on the uses of seeds, and is an important subject for study. Seed germination is regulated at both transcriptional and post-transcriptional levels. Therefore, it is important to study how polyadenylation regulates gene expression during seed germination. To this end, a modified Illumina GAIIx sequencing protocol (described in Chapter Two) was developed that allows deep coverage of poly(A) site position and distribution.
Alternative polyadenylation (APA) regulates gene expression by choosing one potential poly(A) site on a precursor RNA consequentially shortening/lengthening the mRNA relative to other possible sites. To further explore this phenomenon, genes affected by APA …