They lack a nucleus, but contain genes, which determine the composition of enzymes, similar to the eukarya. One particularly important use of an extremozyme was found after the replication of a thermophilic enzyme from a thermophile known as Thermus Aquaticus that was discovered in extremely hot water. PCR, in itself, is a cycling reaction that denatures DNA to separate the strands of the molecule. This is where the Taq polymerase came into affect. PCR is particularly used in determining DNA found at crime scenes, which can prove if it is indeed the suspect in question who committed the crime because each individuals DNA is unique to them.
Extensive study continues on extremozymes and extremophiles.
One form of study involves growing small cultures of an extremophile obtained from an interesting environment. From there scientists add, a protein, for example to see if it will be broken down. The other approach involves isolating DNA from a variety of living things in a sample of water, soil or other material from an extreme environment. Then they use DNA technology to deliver random stretches of DNA, which are then placed in a specified host where it can grow. As the colony grows they look for specific enzyme activity.