Chemicals and materials All DNA sequences were synthesized by Integrated DNA Technologies (USA), purified by HPLC and confirmed by mass spectrometry. Sequences are listed in Table 1. Gold(III) chloride trihydrate, trisodium citrate dihydrate, sodium chloride, magnesium chloride, calcium chloride, Trizma pre-set crystal, potassium acetate, acetate acid were bought from Sigma-Aldrich and used as received. SYBR Gold nucleic acid gel stain (10,000 X concentrated in DMSO) was obtained from Invitrogen. Exonuclease III (E. coli) was purchased from New England BioLabs and human apurinic/apyrimidinic endonuclease1 (APE 1) was provided by our collaborator - Dr. Yuan Liu. Table 1. The employed DNA sequences (from 5' to 3'). Thiolated CP Probe (1)*: HST6ACCACATCATCC/iSpC3/TATAACTGAAA …show more content…
Gold(III) chloride solution and sodium citrate solution were freshly prepared with deionized water and filtered through a syringe filter (0.22 µm). Deionized water (45 mL) was added into three-neck flask incubated in the heating mantle with a stirring bar followed by the addition of HAuCl4 solution (5 mL, 10 mM). After the solution was boiling, the sodium citrate solution (5 mL, 38.8 mM) was added quickly. The color of the mixture gradually changed from black to wine red in the first two minutes, indicating the formation of gold nanoparticles. The AuNPs solution was kept boiling for another 10 minutes with a stirring speed of 700 rpm. After cooling down the solution to room temperature, the AuNP solution was filtered through a syringe filter (0.22µm). The concentration of AuNPs was determined by UV-Vis spectrometer (Cary100, …show more content…
The reaction mixtures were challenged with 10 U Exo III for 1 minute or 100 nM APE 1 for 10 minutes at room temperature and then stopped by heat-inactivation at 80 ºC for 10 minutes. Five µL aliquots of the reaction mixtures were subjected to electrophoresis on a 12% denaturing polyacrylamide gel (17 × 15 cm) containing 20 mM Tris-acetate buffer (pH 7.0) with 0.5 mM EDTA at 15 V/cm for 3 hours at room temperature. The gel was stained for 20 minutes with 1× SYBR Gold and imaged using the ChemiDoc MP imaging system
Throughout today’s society, media contributes to almost everyone’s daily life. From informative news channels to comical television shows, media proves to be effective in advertisement, releasing messages and informing the audience. Although media proves to be wildly effective in advertising, releasing messages and informing the audience, periodically destructive and misleading messages are provided to the audience and directly influencing women. Cultural critics widely agree that media tends to negatively influence women and all the critics point to research which supports the belief that women are portrayed as subordinate to men, having no
Into the Wild, by Jon Krakauer that tells the story of a young man who's been in his 20s, went into Alaska alone and died, however their are more about him that we did not think about. That he makes us understand the real Chris McCandless, from a bibliographic point a view. The people he met, his actions, and Chris own ideas to have one reason to go to Alaska. Chris McCandless is a humble person, he went into the wilderness to test himself the feeling of his own belief about taking a break from socially, to journey without the help of friends that to offer him help to make his journey easier. Furthermore he, does not want them and his family to be part of his odyssey journey for the sake of a test for him to survive alone without having
It has recently been brought to my attention that our school is looking to adopt a sustainable menu into our meal program and I would like to give my viewpoint on the matter. As one many students here at Oxford Academy this change will affect me directly. Although people may at first oppose this conversion I think if we are able to overcome the first obstacles, this change would bring a great positive impact to the environment and the health of our students.
DNA is a term that has been used in science as well as in many parts of daily
Restriction Enzyme Digestion – The experiment was begun after putting on gloves to avoid any chemical contact with the skin. Four microtest tubes were obtained, and each of them was labeled to contain the different enzymes or suspect DNA. Two of the microtest tubes were used for suspect one and the two different restriction enzymes, while two other microtest tubes were labeled for suspect two and the two restriction enzymes. After labeling the tubes, the contents that were at the bottom were taken out by slightly tapping them. Then to begin setting up the enzyme reactions, a micropipette was used to obtain 10 μL of the reaction buffer which was added to each of the four test tubes. The buffer is important because it carries the electrical current from the power supply in the gel. After the reaction buffer was in each, the microtest tubes were individually filled with their specific enzymes and DNA, shown in summary through Table 1.1 below. The restriction enzymes are used to cleave the DNA at specific
Sitting cross-legged on the cold, wooden floor, I started the class by singing Sa-Re-Ga-Ma-Pa-Da-Ni-Sa. With every note, my palm would gently slap against my thigh, keeping a steady 8-count beat. In a constant battle between my American and Indian identities, these “swaras”, or traditional Carnatic notes, have helped me resonate my Indian heritage and realize the importance of my roots.
Protein Synthesis Protein Synthesis is the process whereby DNA (deoxyribonucleic acid) codes for the production of essential proteins, such as enzymes and hormones. Proteins are long chains of molecules called amino acids. Different proteins are made by using different sequences and varying numbers of amino acids. The smallest protein consists of fifty amino acids and the largest is about three thousand amino acids long. Protein synthesis occurs on ribosomes in the cytoplasm of a cell but is controlled by DNA located in the nucleus.
Experiment 1 & 2: The DNA concentration was 60 ng/µL (6.00*10^4 ng/mL). The total yield was 0.6 ng (60 ng/µL DNA /100 µL H2O). The DNA sample was divided by 100 µL instead of 25 µL of H2O because the sample was diluted 4 times.
Enzymes are an important part of all metabolic reactions in the body. They are catalytic proteins, able to increase the rate of a reaction, without being consumed in the process of doing so (Campbell 96). This allows the enzyme to be used again in another reaction. Enzymes speed up reactions by lowering the activation energy, the energy needed to break the chemical bonds between reactants allowing them to combine with other substances and form products (Campbell 100). In this experiment the enzyme used was acid phosphates (ACP), and the substrate was p-nitrophenyl phosphate.
The Product Life Cycle of the technology of the bioresorbables, a relatively new line in a mature technology
Nonetheless we observed two distinct features connected with the core consensus sequence of Epsilonproteobacterial DnaA boxes and DnaA-DnaA box interactions: strict conservation of thymine at the 5th position and the binding of Epsilonproteobacterial DnaA to guanine G4 of a DnaA box. So far the 5th positions of the E. coli consensus DnaA box (TTWTNCACA) and the M. tuberculosis DnaA box (YWRTCCACA) were considered to be variable without influencing affinity towards cognate DnaAs (Fujikawa et al., 2003; Schaper and Messer, 1995; Tsodikov and Biswas, 2011). However, it should be noted that in both species, the 5th position of DnaA box is preferentially occupied by the C residue. All other bases of the sequence, either of the upper or the lower strand, interact with DnaA, and any deviation from the most stringent TTATNCACA consensus sequence results in reduced DnaA affinity towards the less perfect boxes.
Protein synthesis is one of the most fundamental biological processes. To start off, a protein is made in a ribosome. There are many cellular mechanisms involved with protein synthesis. Before the process of protein synthesis can be described, a person must know what proteins are made out of. There are four basic levels of protein organization. The first is primary structure, followed by secondary structure, then tertiary structure, and the last level is quaternary structure. Once someone understands the makeup of a protein, they can then begin to learn how elements can combine and go from genes to protein. There are two main processes that occur during protein synthesis, or peptide formation. One is transcription and
The chemical and reagents used for the extraction and quantitation of DNA were: Plant DNAzol (0.3ml/0.1g), 100% ethanol (100%: 0.225 ml/0.1 g, 75%: 0.3 ml/0.1 g), Chloroform (0.3 ml/0.1 g), Plant DNAzol-ethanol solution: Plant DNAzol, 100% ethanol (1:0.75 v/v), TE buffer (10 mM Tris, 1 mM EDTA pH 8.0), 1.2% agarose gel (Agarose, 1X TAE buffer), 6X loading buffer (glycerol, Tris/EDTA pH 8.0, ethidium bromide), .25X TAE buffer, Restriction enzymes and Restriction endonuclease buffers. All the chemicals used were quality grade. The restriction
The process of DNA replication plays a crucial role in providing genetic continuity from one generation to the next. Knowledge of the structure of DNA began with the discovery of nucleic acids in 1869. In 1952, an accurate model of the DNA molecule was presented, thanks to the work of Rosalind Franklin, James Watson, and Francis Crick. To reproduce, a cell must copy and transmit its genetic information (DNA) to all of its progeny. To do so, DNA replicates following the process of semi-conservative replication. Two strands of DNA are obtained from one, having produced two daughter molecules that are identical to one another and to the parent molecule. This essay reviews the three stages
Cancer is the second leading cause of death in the world (Ferlay et al., 2015) and in recent years there have been many studies to carry out new methods for prevention, diagnosis and treatment of tumor cells and to decrease the side effects of treatment (Tao et al., 2015). In many of these methods a trace of nanotechnology can be found using different type of nanoparticles. In general, nanoparticles have dimensions between 1-100 nm2. Metal nanoparticles are at the center of attention because of their unique physical and chemical properties (Tao et al., 2015). Due to the remarkable optical, electrical and conductive properties of gold nanostructures, they have been extensively studied in a variety of applications (Fryer et