DNA Coursework Example | Topics and Well Written Essays - 750 words

DNA - Coursework Example The enzyme, pyruvate dehydrogenase kinase in humans, has two domains ïÆ'   HATPase_c (Histidine kinase) and BCDHK_Adom3 (Mitochondrial branched-chain alpha-ketoacid dehydrogenase kinase). These domains are responsible for the functionality of the protein. The HATPase_c is an ATP binding domain. The enzyme inactivates pyruvate dehydrogenase using ATP. The HATPase_c domain is responsible for the enzyme’s kinase activity. The secondary structure of the pyruvate dehydrogenase kinase protein comprises of two sheets, two beta hairpins, two beta bulges, seven strands, fifteen helices, twenty-eight helix-helix interactions, twenty beta turns and two gamma turns. It also has a potassium ion ligand. The total alignment score for the three sequences is 99.0 for human and chimpanzee, 97.0 for human and dog, and 97.0 for chimpanzee and dog. Most of the amino acids are conserved in all the sequences, except for a few minor variations. The highest score for human and chimpanzee shows a high protein sequence similarity between the two. The entire stretch of the sequences with conserved amino acid clusters are highlighted below: Now that you have familiarized yourself with these sites, I would like you to make a small addition of your own initiative to the report by using any of the features described above or any other tool that you may have discovered. Using the sequence alignment of the pyruvate dehydrogenase kinase enzyme of human, chimpanzee and dog, created using the CLUSTALW program, a phylogram guide tree was created. This tree shows the phylogeny of the three

Network Intrusion Detection Systems Essay Example | Topics and Well Written Essays - 1500 words

Network Intrusion Detection Systems - Essay Example These intrusion systems have been designed using various techniques. The intrusion system designed with the help of classification technique is the popular ones as it provides more security to the systems in which it is installed. The classification technique is used to classify the type of attack the system faces. (Base 2000).The intrusion system has the responsibility of protecting the system and preventing the attacks. According to Mun the intrusion detection system works well only if the system is selected based on the type of network. The intrusion detection system must be selected to suit the network. There are various types of networks and the system must make sure that it satisfies the network's requirements. The classification technique is used in the intrusion systems to classify and divide the attacks and threats. (Mun 2009).This technique is preferred by most of the network administrators due to its compatibility and efficiency. The intrusion systems work well only when the network's requirements are satisfied. The intrusion detection systems are generally classified into network based intrusion detection systems and host based intrusion detection systems. Network based intrusion system makes use of classification technique since it offers more protection when compared to the other techniques. The systems which are built using classification technique protect each layer of the network. The Ethernet of IP and the other layers are protected and they can be free from intruders. (Northcutt, Noval 2003).Since the classification technique based intrusion detection systems