Cutting and pasting DNA
The discovery of enzymes that could cut and paste DNA made genetic engineering possible. Restriction enzymes, found naturally in bacteria, can be used to cut DNA fragments at specific sequences, while another enzyme, DNA ligase, can attach or rejoin DNA fragments with complementary ends.
dna ligase,dna fragments,restriction enzymes,genetic engineering,bacteria,sequences,discovery
- ID: 15917
- Source: DNALC.DNAi
Related Content
15476. Mechanism of Recombination, 3D animation with with basic narration
Genetic engineering: inserting new DNA into a plasmid vector.
16705. Animation 34: Genes can be moved between species.
Stanley Cohen and Herbert Boyer transform bacteria with a recombinant plasmid, and Doug Hanahan studies induced transformation.
16529. Animation 24: The RNA message is sometimes edited.
Rich Roberts and Phil Sharp explain restriction enzymes, electrophoresis, and split genes.
15320. Building on scientific discovery, Eric Lander
Eric Lander talks about building on scientific discovery.
15487. DNA ligation, 3D animation with no audio
DNA with "sticky ends" can be rejoined and ligated together.
15242. Using RFLPs or SNPs to study patterns in families, Mark Skolnick
Mark Skolnick talks about using RFLPs or SNPs to study patterns in families
15637. Restriction enzyme cutting DNA
A representation of a restriction enzyme cutting DNA.
15541. DNA ligase joining two lengths of DNA at their sticky ends
Once scientists could cut DNA, they still needed a way to paste DNA strands together at will.
15488. Restriction digest, 3D animation with no audio
Restriction enzymes can bind to and cut DNA at specific sites.