Lysozyme

| Lysozyme activity | Observed in tears and saliva | | Connie Jamieson | 3/1/2012 | | Abstract Lysozyme is an enzyme found in both tears and saliva. Each time we blink our eyes, our eyelids wash tears over the surface of our eyes. In addition, our mouth is continually producing saliva. A spectrophotometer set to 450nm was used to measure the effect of lysozyme on bacteria. The absorbance or optical density was measured for each sample at specific times with a total measuring time of

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Summary: The Lysozyme Mechanism Sorted- After 50 Years Nearly 50 years after the first lysozyme crystal structure had been published, the missing piece, the SN2 reaction of the glycosyl-enzyme intermediate, was found. The first lysozyme structure was that of a hen egg white, and it provided a deeper understanding of the mechanism of enzyme reactions. Lysozyme enables the transfer of a glycosyl group to water to occur more quickly. The cleavage of the C-O bond in glycosides without the lysozyme occurs rather

There are two major structures found in dog saliva that apply to this experiment: lysozymes and histatins. Lysozymes are enzymes that have antimicrobial capabilities. They are found in many organisms such as plants, birds, bacteria, mammals, and insects. Lysozymes were first found in the chicken egg by Laschtschenko in 1909. Many scientists have specifically tested its potential use as a natural antibiotic. Lysozymes work by hydrolyzing the peptidoglycan of bacterial cell walls. Because of this, these

This experiment studied the effects different conditions in a reservoir played on the crystallization of lysozyme protein crystals. Two different conditions were tested in order to find the suitable combination to yield the largest tetragonal lysozyme crystals that could be utilized in protein structure identification. The concentration of sodium chloride and the pH levels were subjectively increased across twelve separate reservoir solutions. Utilizing the hanging drop method, the solutions were

proteins. In our experiment, we had 6 wells labeled from A1 till A6, and had different concentration of sodium chloride but the same amount and quantity of the PEG which is the precipitating agent, and Lysozyme. And another 6 wells labeled from B1 till B6 that has different concentration of lysozyme that is used as an protein but the same amount and

Proteins are vital components of all living organisms. These macromolecules are identified as large molecules composed of one or more chains of amino acids. There are twenty different amino acids that can be used to create various types of proteins. Specific sequences of amino acids in a chain is determined by DNA coding of the cell. An amino acid’s sequence is essential since it determines the overall structure and function of a protein. There are several different types of proteins such as enzymes

More research is needed to develop an electrochemical approach for the detection of lysozyme; such a biosensor will offer an alternative, sensitive and versatile method for protein detection. 1.4.6 Flow injection chemiluminescence system A novel analytical procedure, based on chemiluminescence (CL) detection, was described for the determination of lysozyme at ng/ml levels using controlled-reagent-release technology in a flow injection system. The analytical reagents involved

Flemming was a scientist that discovered the enzyme lysozyme in 1923 when he accidently mixed the mucous fom the patient in the culture contain bacteria and the bacteria was dead. That is whee he took a closer look at the properties of the mucous from the patient and found the antibacterial enzyme. Lysozyme is one of many proteolytic ezyme foud in the body. It is a first defense system in the body that can destroyed bacterial cell wall. Lysozyme is very effective against gram positive bactreia because

Ivy mutants showed sensitivity to not only lysozyme but also PMNs. Ivy mutants were less virulent in OF-1 mouse models of bubonic and pneumonic plague (shown in figures below). Sensitivity to lysozyme would mean the release of peptidoglycan fragments. These are known to induce inflammatory compounds. Ivy deficient Yersinia pestis were not shown to induce inflammation