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In 2003, US scientists inserted a DNA translation of the song "It's a Small World" into D radiodurans to show that the bacterium could be used as a means of information storage in the event of a nuclear catastrophe.
Using a micro-injection tool, the researchers inserted a DNA instruction into the mosquito's genome to ramp up expression of the two genes that control this immune system response, but only immediately after a blood meal.
To accommodate the fusion of genes to the β-lactamase gene as BamHI/SalI DNA fragments in the first open reading frame, we inserted a DNA fragment obtained from annealing oligos 5'-CGGATCCCTGCAGGCGGCCGCGTCGACT-3' and 5'-CATGGCCTAGGGACGTCCGCCGGCGCAGCTGAGATC-3' into KpnI and XbaI digested pDXC61[17] to give pDXC61M.
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A retrovirus has a pernicious way of reproducing: it permanently inserts a DNA copy of its genome into the nucleus of a host cell, hijacking the cell's machinery for its own purposes.
The goals are to insert a DNA fragment of interest into a receiving vector plasmid, transform the plasmid into E. coli, recover the plasmid DNA, and check for correct insertion events.
Restriction-free (RF) cloning provides a simple, universal method to precisely insert a DNA fragment into any desired location within a circular plasmid, independent of restriction sites, ligation, or alterations in either the vector or the gene of interest.
To do that, a plant physiologist, Dr. Eduardo Blumwald, came up with a molecular trick: he inserts a DNA sequence from another plant into the tomato so it will produce larger amounts of a protein that can get salt -- or, more specifically, sodium -- out of the way.
In practice the procedure is carried out by inserting a DNA fragment into a small DNA molecule and then allowing this molecule to replicate inside a simple living cell such as a bacterium.
The cytoplasm on the inside is a thick and salty mixture of proteins and other molecules, so inserting a DNA molecule is like trying to squeeze a line of people into an already crowded subway car.
Partensky et al. [41] obtained a similar result when inserting a DNA fragment just next to the 601 sequence.
It was constructed by inserting a DNA fragment encoding the E. coli pelB secretion signal sequence into the pDEST17 plasmid.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com