Enzyme Catalase Essay

Redox signalling is an electron transfer process that is crucial in biological systems. Redox signalling is found in many physiological and pathological systems within the circulatory system. Redox signalling is usually induced by an overproduction of reactive oxygen species (ROS) which can alter the functions of cell processes. Harris,(2012). ROS are radicals that contain one or more unpaired electrons and can be the oxygen radical superoxide or the non-radical hydrogen peroxide (H2O2). ROS can

Among all the serum proteins, antibodies have gained remarkable significance in the therapy of various disorders, owing to their highly specific and unique antigen binding capacity. Among all the antibodies, IgG are more widely used due to their abundance in blood plasma (Junqueira & Carneiro, 2005) and long in vivo circulation time of 23 days (Nezlin, 1994). IgG comprise of two H chains and two L chains linked by one or more disulfide bonds as well as strong non-covalent interactions that hold the

Factors Affecting Enzyme Action ------------------------------------------------- Term 1 Biology Nicole Goosen Table of Contents Introduction: 3 Materials: 3 Method: 4 Risk assignment: 4 Risk: 4 Personal Protective Equipment: 4 Results: 5 Discussion: 5 Conclusion: 6 Introduction: How is the human body able to digest the food that you eat? How quickly your body digests your food? This is because the human body contains enzymes that are the biological substance, a.k.a proteins

Identifying the Genetic Basis of Microbial Iodate Respiration in Marine Environments Dissimilatory (respiratory) metabolisms provide microbes with energy from the reduction of inorganic oxyanions (e.g., NO3-, ClO3-) via the electron transport chain1. Iodate (IO3-) is an example of a thermodynamically stable oxyanion with oxidizing and bioenergetic properties comparable to those of oxygen. Iodate serves as an alternative terminal electron acceptor in the biotic dissimilatory iodate reduction (DIR)

2.3.2 GRKs and -arrestins GPCR desensitization is a deactivation of GPCR-elicited signaling following prolonged or repeated agonist exposure. A major mechanism underlying desensitization is agonist-stimulated phosphorylation and endocytosis of the receptor. The second messenger-dependent protein kinases were originally regarded as the principal mediators of GPCR phosphorylation and desensitization. However, following the discovery of G protein-coupled receptor kinases (GRKs, originally called -adrenoceptor

Human breast cancer MCF-7 cells were obtained from American Type Culture Collection (Manassas, VA, USA). The cells were maintained in RPMI 1640 medium supplemented with 10% FBS, 2 mM L-glutamine, 100 U/mL penicillin, and 100 mg/mL streptomycin at 37 °C in a humidified atmosphere with 5% CO2. Cell viability examination To evaluate the cytotoxic ability of WECU, MCF-7 cells were seeded in 6-well plates at a density of 2×104 cells per well. After incubating overnight, the cells were treated with

F. True; Allosteric enzymes do have two or more binding sites which actually work as regulator sites apart from the active site. G. False; Noncovalent bonds can act together forming the three-dimensional structure. H. False; Affinity chromatography doesn’t separate specific

The Effect of Temperature on Beet Cell Membranes Introduction In this lab, we are going to learn how the stress of temperature affects fresh beets. We have come to learn that cell membranes organize the chemical activities of cells. All cells are made of plasma membranes, often called fluid mosaics. It is sometimes described as a mosaic because it is made of protein molecules that are embedded into phospholipids. Phospholipids are the main structural support of the membrane and the proteins

Endogenous ligands for P2YR The most abundant and best-characterized endogenous ligand for P2YR is the nucleotide ATP. ATP binds to all P2YRs except P2Y6R and P2Y14R12. Its binding characteristics exemplify the complexity of P2YR signalling: at low concentrations it is the only native agonist for P2Y11R, but at higher concentrations it functions as a partial agonist for P2Y1R and P2Y13R, or as an antagonist for human P2Y4R or P2Y12R11, 12, 15. Other nucleotides, such as ADP, UTP, UDP or UDP-glucose

the mean ADC of normal parenchyma was 2.383 _ 10_3 mm2/s ± 0.604, which are comparable to ADCs for normal renal parenchyma reported by Cova et al. [24] and Squillaci et al. [25], they reported 2.190 _ 10_3 mm2/s ± 0.176 and 2.200 _ 10_3 mm2/s ± 0.20, respectively). In this study a statistically significant differences in ADC values between all RCC subtypes and the uninvolved renal parenchyma with (p < 0.001) was found. In concordance with this study, a study conducted by Inci et al. [26] has showed