Using 0.145 g of DL-phenylalanine and 0.500 mL of acetic anhydride (d = 1.082 g mL-1), calculate the theoretical yield of N-acetyl-DL-phenylalanine in grams. Report your answer to three decimal places. g
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- Phenylalanine as N-termminus is incorrect. Please provide the correct solution.What is the ratio of CATION to ANION in Drug X? [blank1] H₂C -H Fogy CH3 SO42 'N CH3 Drug X CH3NH Describe the possible interactions between the SIDE CHAINS of amino acids: I. and II.... II. and III... I. and III... 1. COO NH3* 2 HO II. COO HO NH3* COO NH3* III.Give at least eight official preparations of sulfanilamide. State where they are official.
- Answer the following questions on the basis of the free energies of formation at 25°C shown in the table at the top of the next page: (a) Does the peptide bond between alanine and glycine form spontaneously under standard conditions?Is TMA a volatile compound or a biogenic amine? Is measurement of TMA a reliable index of spoilage? Why and why not?A biochemist completely digests a glycerophospholipid with a mixture of phospholipases A and D. HPLC and mass spectrometry analysis reveals the presence of an amino acid of 105,09 Da, a saturated fatty acid of 256.43 Da, and an omega-3 monounsaturated fatty acid of 282.45 Da. Which amino acid does the glycerophospholipid contain? O valine (C,H, NO,) O alanine (C, H,NO,) O scrine (C,H,NO,) O proline (C,H,NO,) Modify the phosphoglycerol backbone to draw the most likely structure of the lipid. Add the amino acid using the groups tool. Draw Rings Groups More Erase Select
- Give the polarity, melting point, boiling point, solubility, and state at room temperature of the following: Linoleic acid Tripalmitin Triolein Phosphatidylcholine(28:0) Phosphatidylinositol(34:1) Phosphatidylserine(36:2) Phosphatidylethanolamine(38:6) CholesterolBrucine is a poisonous alkaloid obtained from Strychnos nux vomica, a tree that grows in India, Sri Lanka, and northern Australia. Write out a resolution scheme, which shows how a racemic mixture of phenylalanine can be resolved using brucine.A triglyceride L with molecular weight of 712 g/mol yields 2 equivalent moles of lauric acid (12:0) and 1 equivalent mole of oleic acid (18:1) upon hydrolysis. Write chemical equation showing the reaction of laureate with hard water containing Ca " ions. iv.
- N-(2-hydroxyethyl)piperazine-N'-(2-ethanesulfonic A purified protein is in a Hepes acid) buffer at pH 7 with 375 mM NaCl. A dialysis membrane tube holds a 2.0 mL sample of the protein solution. The sample tube floats in a beaker containing 1.00 L of the same Hepes buffer, but with 0 mM NaCl, for dialysis. Small molecules and ions (such as Na+, Cl, and Hepes) can to diffuse across the dialysis membrane, but the protein cannot. Assume there are no sample volume changes during the dialysis. Calculate the final concentration of NaCl in the protein sample once the dialysis has come to equilibrium. Calculate the final NaCl concentration in the 2.0 mL protein sample after dialysis in 150 mL of the same Hepes buffer, with 0 mM NaCl, twice in succession. [NaC1] after a single dialysis: [NaCl] after a double dialysis: x10' TOOLS mM mMN-(2-hydroxyethylpiperazine-N'-(2-ethanesulfonic A purified protein is in a Hepes acid) buffer at pH 7 with 475 mM NaCl. A dialysis membrane tube holds a 2.5 ml. sample of the protein solution. The sample tube floats in a beaker containing 1.75 L of the same Hepes buffer, but with 0 mM NaCl, for dialysis. Small molecules and ions (such as Na*, CI, and Hepes) can to diffuse across the dialysis membrane, but the protein cannot. Assume there are no sample volume changes during the dialysis. Calculate the final concentration of NaCl in the protein sample once the dialysis has come to equilibrium. [NaCl] after a single dialysis: mM Calculate the final NaCl concentration in the 2.5 ml. protein sample after dialysis in 175 mL of the same Hepes buffer. with 0 mM NaCl, twice in succession. [NaCl] after a double dialysis: mMEnumerate the appropriate methods of extraction and purification of glycosides.