The multiple cloning sites (MCS) in pUC18 and pUC19 is the difference - the MCS in pUC19 is reverse orientated to those of the pUC18.
pUC18: LacZ HindIII PaeI ..... SacI EcoRI
pUC19: Lacz EcoRI SacI ..... PaeI HindIII
There is no difference between the two products.
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puc18- plasmid of university of california 18
False
PUC18 is a plasmid, specifically a commonly used cloning vector in molecular biology research. It is small in size and contains a multiple cloning site for inserting DNA fragments, as well as antibiotic resistance genes for selection in bacteria.
The enzyme produced by cells transformed with plasmid lux that is not produced by cells transformed with pUC18 is luciferase. This enzyme is responsible for the bioluminescent properties of animals like fireflies and glowworms. Cells transformed with plasmid lux will emit light in the presence of the substrate luciferin, whereas cells transformed with pUC18 will not.
The pUC18 plasmid contains the ampicillin resistance gene (ampR) which confers resistance to ampicillin. The Lux operon on the plasmid allows for bioluminescence production and acts as a reporter gene. Therefore, transformed cells that harbor both plasmids can grow in the presence of ampicillin due to pUC18 and express bioluminescence due to the Lux operon.
Two different restriction enzymes commonly used to cut the pUC19 plasmid are EcoRI and PstI. For cutting the lux gene DNA, the restriction enzymes commonly used are NcoI and HindIII.
If both the jellyfish glo gene and the puc18 plasmid were cut with the EcoRI restriction enzyme, compatible sticky ends would be generated on both DNA fragments. This would allow the jellyfish glo gene to be inserted into the puc18 plasmid through a process called ligation. As a result, the plasmid could be used to clone the glo gene, facilitating its expression in a host organism for further study or application. This technique is a fundamental method in genetic engineering and molecular biology.
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