3. Norleucine (Nle) is a commonly used amino acid isostere for methionine (structure attached). Sketch a trace of an expected HPLC chromatogram of the tripeptide Ala-Gly-Nle after hydrolysis using a C18-reversed phase HPLC column. H₂N COOH
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- Norleucine (Nle) is a commonly used amino acid isostere for methionine (structure attached). sketch a trace of Ana expected HPLC chromatogrm of the tripeptide Ala- Gly-Nle after hydrolysis using a C18- reversed phase HPLC column H2N COOHNorleucine (Nle) is a commonly used amino acid isostere for methionine (structure attached). Sketch a trace of an expected HPLC chromatogram of the tripeptide Ala-Gly-Nle after hydrolysis using a C18-reversed phase HPLC column.Norleucine (Nle) is a commonly used amino acid isostere for methionine (structure attached). sketch a trace of Ana expected HPLC chromatogrm of the tripeptide Ala-Gly-Nle after hydrolysis using a C18-reversed phase HPLC column H2N СООН
- Q24) Consider the following data obtained from the size exclusion chromatography of polypropylene, which was made from propylene of molecular weight 42.08 g/mol. S.No. Number of Molecular Weight Molecules Range (g/mol) 5 8,000 - 16,000 16 16,000 - 24.000 3. 24 24,000 - 32,000 4 28 32,000 - 40,000 5 20 40,000 - 48,000 48,000 – 56,000 From the above data, determine a) Number average molecular weight (M). b) Weight average molecular weight ( Mw). c) Degree of polymerization (DP)In a mixture of the five proteins listed below, which should elute second in size- exclusion (gel- filtration) chromatography? A) cytochrome c B) ribonuclease A C) immunoglobulin G D) RNA polymerase E) serum albumin M. = 13,000 Da M. = 13,700 Da M. = 145,000 Da M. = 450,000 Da M. = 68,500 Da1.Which of the following correlations about the analyses of iodine and saponificationnumbers is/are incorrect?a. Alcoholic KOH: dissolve KOH to lipid sampleb. Hanus reagent: react with saturated lipid bondc. Reflux set-up: hasten reactiond. Blank titration: determine total mol of KOH2. A triacylglycerol (Sample X) was subjected to saponification analysis. 1.1 grams of thesample was refluxed with 5% alcoholic KOH and the refluxed solution was titrated with 17.2 mLof 0.44 M HCl titrant. The blank solution was titrated with 25.6 mL of the titrant.i. What is the saponification number of the sample? ii. Which of the following could be the identity of the sample? Show solutions pls a. Tripalmitin (MW: 807.3)b. Trilaurin (MW: 639.8)c. Triolein (MW: 885:4)d. Tristearin (MW: 891.48)
- 1) Study the chromatograph (below) of a mixture of Compounds A and B, run on the GCs in the teaching labs at CU Boulder. Compound A has the shorter retention time. STAAT 61 1.11 227 RT TYPE AREA XXXX XXXX XXXX AREAS 0.009 55874 44.117 ARIHT 0.61 XX XX XX 1.11 2.27 XX XX XX TOTAL AREA=XX MUL FACTOR=XX 1. What is the retention time of compound A? Compound B? 2. Which compound is present in a larger amount? 3. Which compound has the lower boiling point? 4. What would happen to the retention times of compounds A and B if the column temperature were raised? 5. You suspect that compound B is octane. What can you do to provide supporting evidence for this hypothesis?16:24 5 ê ☺ I o The glucose concentrations in a patient with mildly elovated glucose lovels were determined by a spectrophotometric analytical method and wore recorded in mot, as tolows 700 775 7eg 774 T77 T80 and 758 Caculato the standard devialion OA 114 OR 135 OC124 O. 129 OL 222 Add a caption... > Status (Custom) +Ferritin (molecular mass 450 000), transferrin (molecular mass 80 000), and ferric citrate were separated by size exclusion chromatography on Bio-Gel P-300. The column had a length of 37 cm and a 1.5-cm diameter. Eluate fractions of 0.65 mL were collected. The maximum of each peak came at the following fractions: ferritin, 22; transferrin, 32; and ferric citrate, 84. (That is, the ferritin peak came at an elution volume of 22 x 0.65 mL = 14.3 mL.) Assuming that ferritin is eluted at the interstitial volume and that ferric citrate is eluted at VM, find Kay for transferrin. Kay =
- Consider the following setup of a capillary electrophoresis (CE) system: What are the two major factors contributing to the moving speed of molecules in a CE separation process? Does the analyte need to be charged for CE separation? Which type of analytes will reach the detector first, positively-charged or negatively-charged?These chromatograms were recorded using reverse phase HPLC. |1,2,3 Peaks: 1. Benzyl alcohol 2. Phenol 5. Ethyl benzoate 6. Toluene 7. 2,6-Dimethoxytoluene 8. o-Methoxybiphenyl 8 3. 3,4-Dimethoxyacetophenone 4. Benzoin 6,7 |2,3 51 5 8 5 5 10 15 20 25 Time (min) Time (min) → a) Give an example of a mobile phase for this type of separation. b) Give an example of a detector that might be used for these compounds. c) Give an example of a stationary phase that might be used for these separations. Chromatogram A Chromatogram BThe following chromatographic peaks indicate the undesirable interaction and separation that taken place. Explain in detail how these undesirable interaction and separation happen for each chromatographic peak. b с d a