Consider the properties of NaOH. Identify by name an amino acid residue whose side chain might be chemically changed when NaOH is added to the protein. Write the chemical equation for the chemical reaction that occurs when said reagent reacts with the side chain functional group of this specific amino acid. Remember that the control is dissolved in pH 7 phosphate buffer.
NaOH is a strong base and so
it will react with any acidic compound. Therefore, the amino acids
which are acidic in nature will react with NaOH to loss their
acidic proton and converted to Sodium salt of that amino acid.
Examples of acidic amino acids are glutamic acid and aspartic acid. These amino acids reacts with NaOH to give sodium salt of these amino acids.
Structures and reactions are given in the attached picture.
Consider the properties of NaOH. Identify by name an amino acid residue whose side chain might...
#4 the reagnet is HCl
3. Look at your plot of the data. Which of the four reagents was the most effective at denaturing protein-chromophore complex? Justify your answer. 12 pts] e lon Hc1 was the most effective. This is because it is aston a cid, whrin esuited in the qrcatest ratt of denatoratianc to the othex denaturants. Consider the chemical chain might be chemically changed when the reagent identifned in #3 ts added to the protein. Write properties of...
how does the protein environment surrounding an amino acid chain affect its chemical properties?Consider the carboxyl group on an asparate side chain in the following environments in a protein. Rank in order these environments from the highest to the lowest proportion of carboxyl groups in the -COO- form.that is in terms of pKas. 1. an aspartate side chain on the surface of protein with no other ionizable groups nearby. 2. an aspartate side chain buried in a hydrophobic pocket on...
The pK of the side chain of amino acid X in a polypeptide is normally in the range of 9-10 and carries a positive charge when protonated. Suppose you have a soluble globular protein and you find there is an X that has a pK of 6.5. What is the most likely reason for such a large drop in pK? Circle the correct answer. a) X is on the surface of the protein where it ion pairs with the carboxylate...
Consider a protein with the acidic side chains, Amino Acid side-chain Arginine pKa = 12.48 Aspartic Acid PKa = 3.90 Cysteine pKa = 8.33 Glutamic acid pKa = 4.07 Histidine pKa = 6.04 Lysine pKa =10.79 Tyrosine pKa =10.13 Given that the pH of blood is about 7.3, how many of the above side chains would be mostly in their ionic form (A-) in blood? 2 3 4 5
A chain GIVEQCCASVCSLYQLENYCN B chain FVNQHLCGSHLVEALYLVCGERGFFYTPKA Shown above is the amino acid sequence of the hormone insulin. This structure was determined by Frederick Sanger and his coworkers. Most of this work is described in a series of articles published in the Biochemical Journal from 1945 to 1955. When Sanger and colleagues began their work in 1945, it was known that insulin was a small protein consisting of two or four polypeptide chains linked by disulfide bonds. Sanger and his coworkers...
10) Would an amino acid with the given side chain be most likely found in the hydrophobic or hydrophilic region of a protein? -CH-CH3 он CH2-CH-CH3 он CH3 11) What process occurs when heat, acids, bases, and heavy metal ions cause loss of biological function of a protein? 12) Answer the following questions regarding enzyme activity: a) The optimum temperature and pH for most biological enzymes is b) The molecules to which an enzyme binds are called the c) The...
QUESTION 13 What chemical group is at the end of an amino acid chain corresponding to the 3' end of the mRNA molecule? A. Peptide bond B.5 phosphate group C.3" hydroxyl group D. Amino (N-terminus) E. Carboxyl (C-terminus) QUESTION 14 Which of the following is true regarding pre-mRNA modifications/processing? O A. Alternative splicing allows for increased complexity and synthesis of protein isomers OB. The 5' cap is added after RNA polymerase dissociates from the gene OC. The poly A tail...
The following is an example of an O-linked oligosaccharide chain in oligosaccharide is linked to the protein by the side-chain functional B the side-chain functional group of serine or threonine residues. Fuda2-12) Gal(β1-34)GlcNAc(B1-4) aride chain in glycoproteins. The O-linkage means the GlcNAc(a1 )-) Serine GalNAc(al>3) al(B1- 4)GIcNAc(B13) Gal(B1->4)GIcNAc(3)G1>3) Fuc(a22) Draw out this polymer from the following Fischer projections of the monosaccharide. 1) Show each monosaccharide in the Haworth projection and in the Chair conformation for the six-member rings. 2) Show...
COLOR 2 mlogg albumen 2 mL. honey 2 ml. amino acid solution 2 mL. distilled water 2 mL. peosein solution bWhich contains more protein (C-N bonds), egg albu- men or honey? How can you tell? Amino acid Amino ackd e. Do free amino acids have peptide bonds? d. What are the functions of proteins in living organisms? но HOH O Polypeptide chain Figure 6.7 A peptide bond joins two amino acids, and pepside bonds link mmany amino acids to form...
1. Four elements make up 96% of the molecules involved chemical a) Oxygen, (0), b) Nitrogen (N), c) Carbon (C), d) Hydrogen (H) Ne in chemical evolution. Which of the following is not one of these? 2. During Chemical Evolution, elements reacted with each other to form sl norga compounds is thought to have been a critical solvent for elements and simple molec Oxygen ef Water molecules? a) Formaldehyde b) Carbon dloxide c) Ammonia d lipid bilayer was important because:...