Which of the following oligopeptides has net charge equal to zero? O Glutamate - Arginine - Aspartate - Lysine OHistidine - Glycine – Tyrosine – Cystine | O Glutamate - Alanine Phenylalanine - Proline O Tryptophan – Methionine – Lysine - Arginine
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- Consider the peptide L-E-T-S-P-R-A-Y Which amino acid(s) is/are basic? A. Y B. P C. R D. L E. T F. S C. A H. EIndicate which of the following amino acids are ketogenic and which are glucogenic: a. tyrosine b. lysine c. glycine d. alanine e. valine f. threonineWrite the one letter code for the oligopeptide Ser-Cys-Ile-Glu-Asn-Cys-Glu and calculate the total charge on it at pH 4.5.
- In the following list, identify the carbohydrate, the fatty acid, the amino acid, and the polypeptide:a. methionine-valine-proline-leucine-serineb. C6H12O6c. NH2CHRCOOHd. CH3(CH2)16COOHIllustrate the pathways to synthesize the following aminoacids:a. glutamineb. serinec. arginined. glycinee. cysteineIndicate whether each of the following amino acids is polar: a. lysine b. tyrosine c. leucine d. asparagine e. proline f. cysteine g. glutamic acid h. valine i. histidine j. glycine
- Indicate whether each of the following amino acids is polar,nonpolar, acidic, or basic:a. glycineb. tyrosinec. glutamic acidd. histidinee. prolinef. lysineg. cysteineh. asparaginei. valinej. leucineA tripeptide has the following sequence: Glu-Trp-Arg What is the net charge of this tripeptide at physiological pH?Treatment of a polypeptide with 2-mercaptoethanol yields two polypeptides 1. Ile—Val—Cys—Arg—Thr—Gly—Cys—Lys—Asn—Phe—Leu2. Trp—Lys—Cys—Phe—Arg—His—Thr—Lys—Cys—SerTreatment of the intact polypeptide with trypsin yields fragments with the following aminoacid compositions(Arg, Cys2, Ile, Ser, Val)(Arg, Cys2, Gly, Lys, Thr, Phe)(Asn, Leu, Phe)(His, Lys, Thr)(Lys, Trp)Edmands chemistry reveal the following PTH derivatives in equal quantity after cycle 1• PTH--Ile and PTH--Trp a) Rewrite the intact polypeptide, by indicating the positions of the disulfide bonds(Indicate your reasoning) b) How many products do you expect after chymotrypsin cleavage of the intactpolypeptide? c) You are performing an isoelectric focusing experiment (IEF) on a gel with a pH range of 2to 14. Indicate on the diagram below at what point along the gel will peptide 1 abovefocus, in the presence (X) and absence (Y) of DTT. (also show your calculations)
- Calculate the overall net charge of the following polypeptide at pH = 2.0Gly-Pro-Glu-Asp-Leu-His-Ile-Gln-Asn-Phe A) +1.76 B) -1.76 C) +0.24 D) -0.24List the steps required for the cell to incorporate NH3 into aminoacids.Draw the titration curves for the following AA’s: Aspartic acid, Alanine, Lysine, Valine, Serine, and Trrosine.