Question: What is recombinant DNA?
About the article "DNA", section "Genetic engineering".

Candidate passages:
 "Main Article": Recombinant DNA Biomolecular Engineering of Molecules.
Recombinant DNA.
Recombinant DNA are DNA biomolecules that contain genetic sequences that are not native to the organism’s genome.
Using recombinant techniques, it is possible to insert, delete, or alter a DNA sequence precisely without depending on the location of restriction sites.
There are a wide range of applications for which recombinant DNA is used. 
Recombinant may refer to:  A recombinant organism - an organism that contains a different combination of alleles from either of its parents.
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Recombinant DNA molecules are sometimes called chimeric DNA, because they are usually made of material from two different species, like the mythical chimera.
R-DNA technology uses palindromic sequences and leads to the production of sticky and blunt ends.
The DNA sequences used in the construction of recombinant DNA molecules can originate from any species.
For example, plant DNA may be joined to bacterial DNA, or human DNA may be joined with fungal DNA.
In addition, DNA sequences that do not occur anywhere in nature may be created by the chemical synthesis of DNA, and incorporated into recombinant molecules.
Using recombinant DNA technology and synthetic DNA, literally any DNA sequence may be created and introduced into any of a very wide range of living organisms.
Proteins that can result from the expression of recombinant DNA within living cells are termed recombinant proteins.
When recombinant DNA encoding a protein is introduced into a host organism, the recombinant protein is not necessarily produced.
Expression of foreign proteins requires the use of specialized expression vectors and often necessitates significant restructuring of the foreign coding sequence.
Recombinant DNA differs from genetic recombination in that the former results from artificial methods in the test tube, while the latter is a normal biological process that results in the remixing of existing DNA sequences in essentially all organisms. 
Recombinant DNA (DNA) molecules are DNA molecules formed by laboratory methods of genetic recombination (such as molecular cloning) to bring together genetic material from multiple sources, creating sequences that would not otherwise be found in biological organisms.
Recombinant DNA is possible because DNA molecules from all organisms share the same chemical structure.
They differ only in the nucleotide sequence within that identical overall structure. 
The word cloning for this type of amplification entails making multiple identical copies of a sequence of DNA.
The target DNA sequence is then inserted into a cloning vector.
Because this vector originates from a self-replicating virus, plasmid, or higher organism cell when the appropriate size DNA is inserted the “target and vector DNA fragments are then ligated” and create a recombinant DNA molecule.
The recombinant DNA molecules are then put into a bacteria strain (usually "E. coli") which produces several identical copies by transformation.
Transformation is the DNA uptake mechanism possessed by bacteria.
However, only one recombinant DNA molecule can be cloned within a single bacteria cell, so each clone is of just one DNA insert.