Restriction enzymes are bacterial proteins that recognize specific DNA sequences and cut DNA at or near the recognition site. These enzymes are widely used in molecular genetics for analyzing DNA and creating recombinant DNA molecules. Restriction...

Restriction enzymes are proteins that are produced by bacteria as a defense mechanism against viruses that infect the bacteria (bacterial phages). Most bacteria have restriction modification systems that consist of methylases and restriction enzymes....

Deoxyribonucleic acid ( DNA) analysis took a leap forward when a Swiss microbiologist, Werner Arber, discovered bacterial substances called restriction enzymes. These enzymes were first detected while scientists were experimenting with a particular...

Enzymes (molecular scissors) that cleave double-stranded DNA at specific palindromic base recognition sequences. These sequences are usually different for each enzyme. Restriction enzymes are named according to the bacterial species of...

A restriction enzyme (or restriction endonuclease) is an enzyme that cuts double-stranded DNA. The enzyme makes two incisions, one through each of the sugar-phosphate backbones (i.e., each strand) of the double helix without damaging the nitrogenous...

Custom design for DNA snippers The powerful gene manipulations that underlie modern biotechnology rely on a set of chemical scissors called restriction enzymes. Normally produced by microorganisms, each of these enzymes snips DNA wherever it encounters a specific string of nucleotides, the...

Recombination-based approach circumvents key cloning hassles Complementary DNA (cDNA) libraries are standard tools for gene expression studies. In theory, the library contains full-- length DNA copies of every mRNA in the starting sample, in abundances representative of the original sample. In reality, however,...