Nucleic Acid Hybridization
Nucleic acid hybridization is a general method in determining the sequence of homologous DNA, it is also used to differentiate order of genes in a haploid set of chromosomes of a particular organism and the size of limitation fragments that contain such sequence. Meaning, it is possible to study the genetic differences between different organisms and individual here on Earth. A nucleic Acid Hybridization analysis uses five laboratory skills the Restriction fragment preparation: where a restriction enzyme is added to a DNA sample, Electrophoresis: separate the restriction fragment from DNA sample, Blotting: single strands are transferred onto special paper or nylon membranes through capillary action, Radioactive
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Plasmid C has some similarity from plasmid A but the similar sequences are found on the different size in the fragments. The autoradiograph gives us more information than the agarose gel or its own.
In Vitro Mutagenesis
In vitro mutagenesis a technique used to introduce specific changes into the sequence of a cloned gene. Mutations alter function of protein product. Mutated gene turned to the host cell, is possible to determine function of the missing normal protein by examining what changes occur in the cell.
Methods of In Vitro Mutagenesis:
1. After cloning, the double-stranded plasmid is denatured to obtain a single-stranded DNA template that includes the wild-type version of the DNA of interest.
2. A mutagenic primer is allowed to base-pair with the single-stranded template. The primer consists of two regions that are complementary to template regions on either side of a mismatched region – a region where the base sequence of the mutagenic primer is not complementary and will not pair with the base sequence in the template DNA.
3. Addition of DNA polymerase elongates the primer strand to produce a double-stranded plasmid, one strand representing the original genetic information and the other strand representing the new mutant DNA.
4. The vectors (plasmids) are then used to transform bacterial cells, which replicate both strands of the plasmid. When such a transformed cell first divides,
This lab is about moving genes from one thing to another using plasmids. Plasmid has the ability to replicate, so it replicates independently, and separately from the chromosomal DNA. Plasmid are one or more small piece of DNA and they enter cells as a double strand DNA. When they enter the cell as a doubke strand they do not invade he chromosomal DNA. We will also transform bacteria into GFP which is mainly from the jelly fish Aequorea Victoria. The GFP causes the the jelly fish to fluorescent and glow in the dark. After the transformation, bacteria starts to make the GFP which causes them to glow a green color under a ultraviolet light.
134). They are loops of DNA that are separate from the chromosomal DNA and can self-replicate in a cell, found mostly in bacteria (Brown, 2011; Addgene, 2015). Lederberg and William Hayes discovered that plasmids were being transferred from one cell to another, not the chromosomal DNA (Brown, 2011, p. 135). This discovery lead to plasmids being an essential tool for scientists. Scientists can engineer plasmids to have specific genes to introduce into new cells (Brown, 2011, p. 134). On a plasmid loop there will be an origin of replication (ORI) and a multiple cloning site (MCS) where the gene of interest is inserted (Bio-Rad, 2015). This region has specific restriction enzyme recognition sites, which are cut by the enzymes to open up the DNA where the new gene will be inserted (Jove Science Education Database, 2015). Most plasmids will also contain an antibiotic resistance gene allowing cell survival in environments containing antibiotics (Jove Science Education Database, 2015).
Control plasmids lux and pUC18 were introduced into E. Coli through a process of transformation.
DNA. The isolated plasmids are ran on 40 ml 1% agarose gel at 110 volts with 1.2 μl 6X track
PCR permits the synthesis of millions of copies of a specific nucleotide sequence in a few hours. It can amplify the sequence, even when the targeted sequence makes up less than one part in a million of the total initial sample. Steps of the PCR cycle are shown in below figure.
One of the most imperative functions in maintaining the development of evolution is the frequency of genetic transformation: the injection of foreign DNA into another organism’s DNA. This term is defined by the actions of a vector, but more specifically by the actions of plasmids and phages. However, in this experiment we are primarily focused on the effect of the pGLO plasmid transformation of GFP on the E. coli bacteria by introducing a second chromosome or a plethora of cloned plasmids. (Bassiri 2011)
For this experiment, E. coli was best for genetic engineering because of their size, and their fast reproduction (Spilios, 2017). E. coli will be genetically transformed using an engineered plasmid. A plasmid is a circular piece of DNA which independently replicates and multiplies because it has its own origin of replication (Spilios, 2017). The pGLO is the plasmid used in this experiment. Plasmids are used as vectors and they contain manipulated genes such as genes coding for antibiotic resistance for drugs like ampicillin. This antibiotic resistance of such serves as the selectable marker in genetic transformation and for genetic transformation to proceed, the cell must reach competency which is the physiological state that is required for the vector plasmid to get into the cell for transformation (Spilios, 2017). While competency can be reached naturally in some organism, it must be reached artificially in E. coli through treatment with CaCl2 and exposing them to heat shock using incubation (Spilios, 2017).
coli are picked and the plasmids are purified. The purified plasmids are used as a template for the sequencing reaction. The objective of the lab was to learn how to use the polymerase chain reaction (PCR) to amplify the small subunit ribosomal RNA gene from a bacteria colony, also be able to run an agarose gel to visualize the resulting PCR amplifications and extract the amplified DNA from the agarose gel.
The transposon in this experiment is contains kanR in between the inverted repeats on either end, which will be transposed from the plasmid pVJT128 to the chromosome of the recipient bacteria.
Plasmids are small double stranded circular non chromosomal DNA molecules containing their own origin of replication. Hence, they are capable of replication independent of the chromosomal DNA in bacteria. Plasmids present in one or more copies per cell, can carry extra chromosomal DNA from one cell to another cell and serve as tools to clone and manipulate genes. Plasmids used exclusively for this purpose are known as vectors. The genes of interest can be inserted into these vector plasmids creating a recombinant plasmid. Recombinant plasmids can play a significant role in gene therapy, DNA vaccination, and drug delivery [Rapley, 2000].
Isolation of plasmid DNA from three cultures of E.coli using a method known as the alkaline lysis method.
The product that will result by genetically modifying this organism’s genome is known as a recombinant protein. The process will combine the human protein with a vector, a specific DNA molecule, which will transport the genetic material. This procedure will use a bacterial plasmid. The plasmid is
In this laboratory experiment, we was introduce to an introduction to streaking and spreading of bacteria in agar plates such that single cells can be isolated from one another, each cell can reproduces to form a visible colony composed of genetically identical clones. Streaking and spreading bacteria is to obtain individual colonies is usually the first step in genetic manipulation of microorganisms.
Bacterial transformation is the process of moving genes from a living thing to another with the help of a plasmid.The plasmid is able to help replicate the chromosomes by themselves; laboratories use these to aid in gene multiplication. Bacterial transformation is relevant in everyday lives due to the fact that almost all plasmids carry a bacterial origin of replication and an antibiotic resistance gene(“Addgene: Protocol - How to Do a Bacterial
The polymerase chain reaction or PCR for short can be used to create many copies of DNA. This allows the DNA to then be visualized using a dye like ethidium bromide after gel electrophoresis. The process has been refined over the years, however the basic steps are similar.