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Site directed mutagenesis allows one to introduce virtually any desired mutation in a specific gene. One very useful application of the technique involves modifying a particular protein and evaluating the effect on biological or chemical activity.
In the past, two methods have been used for producing modified proteins.
One is to use chemical agents or ultraviolet light to induce mutations that result in changes in the amino acid sequence of proteins.
The other is to modify certain residues in an isolated protein by treatment with chemical reagents;
an example is the inactivation of a reactive serine in the active site of proteolytic enzymes like chymotrypsin, using diisopropylflurophosphate.
a) Why is site-specific mutagenesis superior to the two older procedures described above? ?b) In order to carry out the modification of a protein using site-specific mutagenesis in the most efficient way, what sort of information should you have about the protein you wish to modify?
Four balloons, each with a mass of 10.0 g, are inflated to a volume of 20.0L, each with a different gas: helium, neon, carbon monoxide or nitrogen monoxide. If the density of air at 25 degrees C and 1.00 atm is 0.00117 g/mL, will any of the baloon..
5Ca+ V2O5 ----> 5CaO + 2V In one process, 1.54 x 10^3 g of V2O5 react with 2.07 x 10^3 g Ca. Calculate the theoretical yield of V. Calculate the percent yield if 795 g V are obtained
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Can you calculate the pI (equivalence point) for the following peptide? - Phe-Lys-Glu-Asp-Lys-Ser-Ala (Note: there is only one alpha-carboxyl at the C terminus.
Write the half reactions and the overall cell reaction for each of the following voltaic cells: a)Al(s)/Al^3+(aq)//Cd^2+(aq)/Cd(s) b)Sn(s)/Sn^2+(aq)//Fe^3+(aq),Fe^2+(aq)/C (graphite)
The equation for the reaction o KHP and NaOH shows ratio 1:1 ratio for the two reactants. Experimentally ,how do you know that base solution that you delivered from the burette had just as many moles as were in the KHPsample that you weighed out i..
Differentiate between the dfferent bond types of orbital overlap required to obtain a sigma bond and pi bonds
Solid lead(II) sulfide reacts with aqueous hydrochloric acid to form solid lead(II) chloride and dihydrogen sulfide gas. Express the answer in a balanced chemical equation with all phases identified.
Assuming that the smallest measurable wavelength in an experiment is 0.670 fm (femtometers), what is the maximum mass of an object traveling at 605 m·s-1 for which the de Broglie wavelength is observable
A 184-mg sample of Na2CO3 is dissolved in H2O to give 3.00L of solution. What is the concentration of Na+ in parts per million (ppm)?
Produce a buffer solution that has a pH of 5.32. You already have a solution that contains 10 \rm mmol (millimoles) of acetic acid. How many millimoles of acetate
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