Summary
DNA made by combining sequences from different sources, typically using restriction enzymes and ligase.
In depth
Paul Berg made the first recombinant molecule in 1972; Cohen and Boyer created recombinant plasmids in bacteria in 1973. Combination allows the production of foreign proteins in host cells.
The recombinant plasmid replicates with the host, producing many copies of the insert. Selecting transformed cells uses antibiotic resistance genes. Safety guidelines restrict use of dangerous genes.
Example: recombinant hepatitis B vaccine antigen is made in yeast.
Recombinant DNA is a molecule that combines sequences from two or more sources, first made by Cohen and Boyer in 1973. A gene is cut out with restriction enzymes, joined into a vector with ligase, and inserted into a host that replicates it.
The method enables large-scale production of proteins, study of gene function and development of GM organisms. The 1975 Asilomar conference set early safety guidelines, and labs still use biosafety levels.
Example: a plasmid carrying the human insulin gene and an ampicillin resistance gene.
Key idea: because DNA is a universal code, a gene from one species can often work in another, such as a jellyfish gene lighting up mice.
Frequently asked questions
What is Recombinant DNA?
DNA made by combining sequences from different sources, typically using restriction enzymes and ligase.
Which area of biology covers Recombinant DNA, and how advanced is it?
Recombinant DNA is one of the 56 topics in Biotechnology & Genomics. It is rated Intermediate, so it suits learners who already know the core vocabulary. Related topics in this area include Genetic Engineering, Insulin Production, Transgenic Organisms.
Can you give an example of Recombinant DNA?
Recombinant human growth hormone replaced cadaver-derived hormone, which carried a prion risk.
What should I learn before Recombinant DNA?
Work through the Beginner topics in Biotechnology & Genomics first, such as Biotechnology, Genetic Engineering, Selective Breeding, then return to Recombinant DNA. Intermediate topics assume the Beginner vocabulary.
What topics are related to Recombinant DNA?
The closest topics to Recombinant DNA are Genetic Engineering, Insulin Production, Transgenic Organisms, Gene Cloning Workflow. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Recombinant DNA?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Recombinant DNA. To practise the whole of Biotechnology & Genomics, use the Biotechnology & Genomics quiz.
How is Recombinant DNA different from Genetic Engineering?
Recombinant DNA: DNA made by combining sequences from different sources, typically using restriction enzymes and ligase. Genetic Engineering: Direct alteration of an organism's genes, often by inserting DNA from another species. Read both side by side and note what each one explains.
How should I study Recombinant DNA step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Genetic Engineering and explain the difference aloud. Finally, take the Biotechnology & Genomics quiz and come back to this page for any question you miss.