Task-2 Part-2 Fibrous proteins /collagen: From my diagram I can observe the quaternary structure is 3 helical polypeptides which are looped around and is held by hydrogen bonds. The 3 stranded molecules runs parallel to others and the disulphide cross-linkages between the r-groups of the amino acid holds the molecules together forming fibres. Collagen molecules forms covalent bonds which are called cross links‚ with other collagen molecules next to it. The cross-links that form are shocked along
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Question 5: The chromophore in this assay is Coomassie Brilliant Blue dye. Question 6: It is important to set up a blank to separate the solute (saline) from the protein (stock). By subtracting the absorbance of the blank (which has no protein present) from the original absorbance the absorbance of the protein at each concentration will remain. Question 7: The Lowry method relies on two different reactions. The first is the formation of a copper ion complex with amide bonds‚ forming reduced
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How the structure of proteins are related to their functions Rachel Morris The basic building blocks of proteins are amino acids‚ the biuret reaction tests for protein. A solution of sodium hydroxide is added to a sample then a few drops of copper sulphate solution‚ if positive – the solution will turn mauve. There are 20 different amino acids and they can be joined in any order. Therefore there can be many different functions. A protein consists of one or more polypeptide chains (a polypeptide
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purification of proteins What are proteins? Proteins are the main building blocks of life. They are essential for the body and have many different roles . Proteins are made from sequence of amino acids. Protein structure is determined by their sequence of amino acids‚ which are linked by peptide link. Proteins are made from about 50 to 2000 amino acid residues. Figure 1 Why purify proteins? They are many reasons why a biochemist might want to purify a protein. For example to
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Why should we care about proteins? • Proteins perform structural and functional roles in the body • Your body uses them‚ to build and repair tissue. It is an important building block of bones‚ muscles‚ cartilage‚ skin‚ and blood. • Proteins are a major key in making hormones like insulin • Albumin‚ which is a protein made by the liver acts like the bloods 24-hour service that attaches to and transports fatty acids‚ calcium‚ and other substances through the circulatory system to cells throughout the
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highly pigmented protein that imparts the characteristic color to certain blue-green algae. It also facilitates a reaction necessary to the survival of this species; we can follow the kinetics of this reaction by measuring the conversion of Substance X to Substance Y at various times during purification.” Techniques and methodologies for extracting the proteins and purifying Enzyme X are as follows: The blue-green tinted proteins in Enzyme X give a distinct color to algae. The proteins are contained
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In our experiment‚ we will be testing three different proteins to see if they denature at the same temperature. A protein is a molecule containing amino acids created in ribosomes that have many functions‚ including being an enzyme and transporter‚ structuring‚ translating genetic information‚ and serving as a channel for charged molecules to pass through the cell membrane. As a molecule‚ a protein is shaped like a coil (Food Science Basics 2014). Denaturation is when a protein’s shape changes due
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CHEM120 Week 7 iLab: DNA‚ mRNA‚ and Protein (30 points) Name: Kaylee Klefman Complete the two questions below. Each question has four parts. This assignment is two pages long. Question 1: For the following double-stranded DNA sequence‚ -CATTGACCGTAA- -GTAACTGGCATT- Answer the following questions: a) Assume that RNA polymerase will read the top strand of DNA as the “template” to synthesize mRNA. What will be the sequence of the mRNA synthesized? (3 points) The new mrna
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All cells have the same basic structure (see figure 1) however some cells are specialised to suit a specific purpose. An example of this is the pancreatic beta cells found in the islets of Langerhans. These cells are specialised to synthesise the protein insulin that is involved in the metabolism of glucose in the cells. (Layden‚ 2010) Figure 1 - Picture to show basic structure of a cell. (Farrabee‚ M J. 2007) But how is insulin made? The production of insulin starts in the nucleus which is the
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Experiment 2: Food Tests Objective * To study the presence of reducing sugars. * To study the presence of protein. Introduction In this experiment‚ glucose‚ maltose‚ lactose and sucrose are used for testing reducing and non-reducing sugars. Glucose is monosaccharide while maltose‚ lactose and sucrose are disaccharides of carbohydrates. Monosaccharaides are the monomers which make up all other carbohydrates and cannot be broken into smaller molecules by hydrolysis. Disaccharides are
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