Q1 A research laboratory identified a gene X of medicinal value in a plant species. You...

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Biology

Q1 A research laboratory identified a gene X of medicinal valuein a plant species. You are given a small fragment of DNAcontaining gene X and the cloning vector pZoom. Maps of the 4 kbcloning vector pZoom and the 10 kb plant DNA fragment are shown inFigure 1 and 2, respectively. The PCR primer pairs (shown in Figure1) F1/R1, F2/R2 and F3/R3 amplify fragments of 0.1, 0.6 and 0.8 kb,respectively. The antibiotic resistance gene A and gene B code forchloramphenicol and streptomycin resistance, respectively. Thethree restriction enzymes that cut this vector are BamHI, XbaI andHindIII represented on the map as enzymes I, II and III,respectively. You are given purified DNA of both the vector and thegene X containing DNA fragment at 0.2 µg/ul. Create a recombinantplasmid containing the complete gene X in the provided cloningvector pZoom. a. Design restriction digestion reactionsusing appropriate enzymes in such a way that you get a finalconcentration of 50 ng/µl for the digested vector and for the plantDNA (insert DNA) in the reaction. Your digestion should include allcomponents in a 20 µL reaction. All enzymes are supplied with aconcentration of 10 units/µL; you may use 1 µL of the enzyme ineach reaction. Buffers for each enzyme are available as 10 timesconcentrated (10X) stocks. b. Generate three ligation reactionswith 1:1, 2:1 and 3:1 molar ratios of the insert and the vectorDNA. Your ligation should include all components in a 30 µLreaction. Keep the vector amount fixed at 100 ng per ligationreaction. You are provided with 10 x ligase buffer and DNA ligase(0.5 U/µL) to set up your ligations. c. Develop a strategy toselect transformants and a quick method to screen recombinants;show your screening method using a figure. Predict the expectedresults with an explanation. d. Devise a restriction analysismethod to confirm the desired recombinant; use a single mostappropriate enzyme. Calculate the expected sizes of the restrictionfragments from each, the vector and the desired recombinant. e.Devise a PCR strategy to confirm the desired recombinant. Calculatethe expected sizes of the PCR fragments from the desiredrecombinant in a multiplex PCR including all three primer pairs.How will these sizes differ from the same multiplex PCR if thetemplate is vector DNA instead of the recombinant plasmid?

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1 the reaction mixture for the restriction enzyme will be as follows using a Vector and gene X DNA 200 ng micro liter 02 gul stock to final concentration of 50 ngl Genomic DNA 5 micro liter 1 micro gram DNA for a final concentration of 50 ngl in final volume of 20 micro liters 10X buffer 2 micro liter Restriction Enzyme 1 micro liter 10 Uul Sterile water to make up volume 12 micro liter Final Volume 20 micro liter 2 the insert vector ratio is calculated by the following formula Nano gram ng of vector X size of insert Kb size of vector kbX ratio of insert vector ng of insert suppose the size of vector is 4000 bp 4kb and three insert fragments of 01 kb 100 bp 06 kb 600 bp and 08 kb 800 bp    See Answer
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