Which of the following is least soluble in hexane?
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- Saponify this mixed triglyceride with 3NaOHWhy should phenylketonurics avoid using aspartame, an artificial sweetener? (Hint: Aspartame is Laspartyl-L-phenylalanine methyl ester.)The peptide CMYLES is reacted with phenylisothiocyanate under basic conditions followed by incubation with anhydrous trifluoroacetic acid. What are the products of this reaction? PTH-CMYLES Thiazolinone derivative of cysteine, MYLES O PTH-C, PTH-M, PTH-Y, PTH-L, PTH-E, PTH-S PTH-C, MYLES PTH-S, CMYLE
- Draw the stereoisomers of the following amino acids. Indicate pairs of enantiomers and pairs of diastereomers. leucineCH3CHCH2 CHCOO−CH3 +NH3 isoleucineCH3CH2CH CHCOO−CH3The anomer of a-D-glucopyranose is CH:OH он ÓH CH2OH он он он он CH,OH он он он он CH,OH он OH он ÓH ÇH;OH он он он онDehalogenase enzymes catalyze the clevage of C-X bonds. One such dehalogenase catalyzes the following reaction. An active site aspartate is thought to carry out the initial nucleophilic attack that expels the chloride. Select the most likely intermediate in the reaction. (Note the stereochemistry. Refer to P11.19 in the textbook if needed.) O O A C D OE -CH₂ H H₂C™ CO₂ H B CO₂ CI N H₂O Cr CO₂ H CO₂ нотум CH3 D CO₂ five N E CH₂
- Amino acids can be prepared from a-halo carboxylic acids [RCH(X)COOH] by reaction with excess NH3. Why is excess NH3 needed for this reaction?g) (CH3)₂ - CH₂ -CH-COOH + CH₂-CH-COOH -H₂O NH₂ OH NH₂ 4. Write the equation for the digestion (hydrolysis) of Phe-Asp-Ala. €.com/forms/d/e/1 FAlpQLSenLacS5BakgugJMG pBYf0hNjcZaGs2F2MZs4Kn Y10W43JQ/formResponse MCQ Which of the following oligopeptides has net charge equal to zero? O Glutamate - Arginine - Aspartate Lysine O Histidine - Glycine - Tyrosine - Cystine | Glutamate - Alanine - Phenylalanine - Proline O Tryptophan - Methionine - Lysine - Arginine