1. The gel presented here shows the pattern of bands of fragments produced with several restriction enzymes. N A E Wells 2 1 0.5 A= Aatil N= Ncol E= EcoRI (a) From your analysis of the pattern of bands on the gel, draw the correct restriction map and explain your reasoning. (b) The highlighted bands (magenta) in the gel hybridized with a probe for the gene pep during a Southern blot. Where in the gel is the pep gene located? Mark the area on the restriction map. Fragment size (kb) w+Z

1. The gel presented here shows the pattern of bands of fragments produced with several restriction enzymes. N A E Wells 2 1 0.5 A= Aatil N= Ncol E= EcoRI (a) From your analysis of the pattern of bands on the gel, draw the correct restriction map and explain your reasoning. (b) The highlighted bands (magenta) in the gel hybridized with a probe for the gene pep during a Southern blot. Where in the gel is the pep gene located? Mark the area on the restriction map. Fragment size (kb) w+Z

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter28: Dna Metabolism: Replication, Recombination, And Repair

Section: Chapter Questions

Problem 9P: Heteroduplex DNA Formation in Recombination From the information in Figures 28.17 and 28.18, diagram...

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The structure of a typical pUC19/human DNA recombinant clone. Ensure that you clearly indicate the restriction enzyme sites at the ends of the human DNA insert. Hint: think about the compatibility of the ends generated by partial digestion of human DNA and complete digestion of the vector – will the original sites in the vector be regenerated or not, or it is impossible to predict?
he gel presented here shows the pattern of bands of fragments produced with several restriction enzymes. (a) From your analysis of the pattern of bands on the gel, draw the correct restriction map and explain your reasoning. (b) The highlighted bands (magenta) in the gel hybridized with a probe for the gene pep during a Southern blot. Where in the gel is the pep gene located?
a.) wanting to clone gene Z into pVector, the gene is amplified by PCR and restriction sites are added to the flanking ends. without realizing that the antibotic resistant gen )tetR) had a Sal1 site, you decide to add EcoR1 and Sal1 recofnition sequencen into the 12-nucleotide primers. Write the sequence of the 2 primers, noting the 5' and 3' ends?
#16) The restriction enzymes Xhol and SalI cut their specific sequences as shown below: XhoI 5' C | TCGAG 3' SalI | 5' GTCGAC 3' 3' GAGC | TC 5' 3' G | AGCTG 5' Can the sticky ends created by XhoI and SalI sites be ligated? If yes, can the resulting sequences be cleaved by either XhoI or SalI?
Heteroduplex DNA Formation in Recombination From the information in Figures 28.17 and 28.18, diagram the recombinational event leading to the formation of a heteroduplex DNA region within a bacteriophage chromosome.
Homologous Recombination, Heteroduplex DNA, and Mismatch Repair Homologous recombination in E. coli leads to the formation of regions of heteroduplex DNA. By definition, such regions contain mismatched bases. Why doesnâ€™t the mismatch repair system of E. coli eliminate these mismatches?
Chemical Mutagenesis of DNA Bases Show the nucleotide sequence changes that might arise in a dsDNA (coding strand segment GCTA) upon mutagenesis with (a) HNO2, (b) bromouracil, and (C) 2-aminopurine.
To determine the reproducibility of mutation fre-quency measurements, you do the following experiment.You inoculate each of 10 cultures with a single E. coli bac-terium, allow the cultures to grow until each contains 106cells, and then measure the number of cells in each culturethat carry a mutation in your gene of interest. You were sosurprised by the initial results that you repeated the experi-ment to confirm them. Both sets of results display the sameextreme variability, as shown in Table Q5–1. Assuming thatthe rate of mutation is constant, why do you suppose thereis so much variation in the frequencies of mutant cells indifferent cultures?
The recognition sequence for the restriction enzyme Sau3AIis GATC; in the recognition sequence forthe enzyme BamHI—GGATCC—the four internal bases areidentical to the Sau3AI sequence. The single-stranded endsproduced by the two enzymes are identical. Suppose youhave a cloning vector that contains a BamHI recognitionsequence and you also have foreign DNA that was cut withSau3AI. Can this DNA be ligated into the BamHI site of the vector,and if so, why?
Nonhomologous end-joining (NHEJ) of a doublestrand break almost always results in perfect resealingof the DNA lesion, without the loss or gain of nucleotide pairs. Yet CRISPR/Cas9, which produces doublestrand breaks, is a highly efficient method of makingsmall deletions or insertions at the targeted site. Howcan you resolve this apparent contradiction?
6a. Given the following mutated sequence (with respect to the normal sequence), what TYPE of mutation occurred: AAGCTTAC 6b. Where did the mutation take place?
After digesting the DNA produced by PCR (generated using the primers mentioned in question 2 added for context below) and the pET-28a vector with restriction enzymes SacI and HindIII, what steps would be needed to obtain a pure culture of E. coli cells that contain the pET-28a-OXA-M290 plasmid (i.e., a culture which consists only of E. coli cells that contain this plasmid)? And, how could you confirm that the OXA-M290 gene was successfully cloned into the pET-28a vector without any mutations? [4 – 8 sentences suggested] Question 2 (Do not answer, just for context):The forward primer that will be designed is the primer that binds to the region of the OXA-M290 gene where the start codon is located, and the reverse primer is the primer that binds to the region of the gene where the stop codon is located. In order to clone the PCR product generated using these primers into pET-28a, extra nucleotides must be added to the 5' ends of the primers. These extra nucleotides will contain the…