Doyle is first seen in a conference room with Dr. John Brand. He is also the first person in the mission who docks Ranger 1 & 2 to the Endurance. Later, he, Cooper, Amelia, and CASE go down to the water planet Miller.
Structure and function of the yeast URA3 gene: expression in Escherichia coli. Rose M, Grisafi P, Botstein D. The expression of the cloned Saccharomyces cerevisiae URA3 gene in Escherichia coli on both plasmid and phage vectors was studied.Isolates of the gene from two different laboratory strains of yeast differ in their ability to be expressed in E. coli in the absence of external adjacent promoters of transcription.The DNA sequence of the two genes was determined and revealed several differences in the DNA flanking the structural gene.One base change alters the Pribnow-box of an E. coli promoter present in the yeast sequences.solates of the gene from two different laboratory strains of yeast differ in their ability to be expressed in E. coli in the absence of external adjacent promoters of transcription. The DNA sequence of the two genes was determined and revealed several differences in the DNA flanking the structural gene.
Its systematic name is YEL021W. URA3 is often used in yeast research as a marker gene, that is, a gene to label chromosomes or plasmids. URA3 encodes Orotidine 5'-phosphate decarboxylase (ODCase) , which is an enzyme that catalyzes one reaction in the synthesis of pyrimidine ribonucleotides (a component of RNA).ince URA3 allows for both positive and negative selection, it has been developed as a genetic marker for DNA transformations and other genetic techniques in bacteria and many fungal species. It is one of the most important genetic markers in yeast genetic modification.