Suppose we want to insert the human insulin gene into E. coli using pBR322 as the expression vector. 1. Explain how you will identify colonies that have been successfully transformed. 2. Identify all restriction enzyme(s) that would be appropriate for inserting the gene into pBR322. 3. Explain why the enzyme(s) from #2 are appropriate. Think about the function of the sequences in the expression vector when you answer this question. 4. The plasmid map shows that amp and ori are oriented in one direction and tet is in the opposite direction. How is this possible? 5. Suppose you decide to run the DNA on a gel to check each step. Draw the gel that would result from the following: Lane 1 molecular weight marker Lane 2 undigested pBR322 Lane 3 pBR322 digested with your selected restriction enzyme (identify which enzyme) Lane 4 pBR322 digested with your selected restriction enzyme then ligated with human insulin gene
Bacterial Genomics
The study of the morphological, physiological, and evolutionary aspects of the bacterial genome is referred to as bacterial genomics. This subdisciplinary field aids in understanding how genes are assembled into genomes. Further, bacterial or microbial genomics has helped researchers in understanding the pathogenicity of bacteria and other microbes.
Transformation Experiment in Bacteria
In the discovery of genetic material, the experiment conducted by Frederick Griffith on Streptococcus pneumonia proved to be a stepping stone.
Plasmids and Vectors
The DNA molecule that exists in a circular shape and is smaller in size which is capable of its replication is called Plasmids. In other words, it is called extra-chromosomal plasmid DNA. Vectors are the molecule which is capable of carrying genetic material which can be transferred into another cell and further carry out replication and expression. Plasmids can act as vectors.
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