Phytase

Both genes involved in the creation of the Enviropig come from two very different sources. The first gene was taken from the bacteria Escherichia Coli and codes for that’s species ability to create phytase. Phytase is an enzyme that allows for the breakdown and digestion of phytic acid, an indigestible form of phosphorous found in grains. The second gene was taken from mice and promotes the continuous secretion of proteins in the salivary glands. By combining the two genes together successfully within the pig, researchers gave these pigs the innate ability to continually secrete phytase within their saliva. With the addition of phytase to the pig’s digestive system, the Enviropig is now able to successfully digest phytic acid. This ability…

Multiple methods of reducing the amount of phosphorous in pig manure have been explored. Most recently, there has been increased research into using genetics as a means of increasing phytase activity in pig saliva. Meidinger et al.’s study demonstrated that, when compared to phosphorus usage in pigs fed diets with added supplemental phosphorus and phytase enzyme respectively, use of PSP-appA transgenic Yorkshire pigs is the best available approach to decrease environmental phosphorus…

Transgenesis Transgenesis is the process in which an exogeneous gene (transgene) is added to an organism genome, and this results in expression of the gene which can then be passed down to its offspring. I have chosen to research how the Enviropig has been manipulated using transgenic techniques. The transgene inserted into the Enviropigs genome is Escherichia coli K12’s phytase gene, this gene gives the Enviropigs the ability to produce phytase in their salivary glands, and it gets infused in…

and the culture conditions (Braun et al., 1991).The fungal morphology for these fermentation is of great importance since it affects the rheaological properties of the fermentation broth and consequently its mass, heat and transfer characteristics . The morphology of filamentous ,micro-organisms during upon the culture condition and strain genotype (papagianni et al.,1998) .All growth forms have their own characteristics regarding growth kinsetics nutrient consumption and broth tonicity…

Pig’s manure releases phosphorous into the environment mainly because pigs can't digest it. At large scale, pig’s manure becomes toxic and pollutes the environment. The solution was a human-made gene that combines the phytase protein produced by E.coli and an enzyme found in the mouse saliva that allows pigs to absorb phosphorous. This genetic modification reduces the fecal phosphorus by 75% and creates a solution to the environmental pork industry pollution. However, is not mentioned how that…

animals that have been inserted with certain genes for beneficial reasons (Morris 104). With animals, especially livestock, scientists alter the DNA of these animals to enhance food quality, create disease-resistant animals or crops, and controlling of animal pollution. Scientists have inserted special proteins in cows, goats, and sheep that “express medically important proteins in their milk” (Ormandy). Other scientist have also inserted a bacterial gene into Maize with an anti-pathogen protein…