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2) Draw the dipeptide N-terminal end and Ser-Gly, dabel the the C-terminal end. Circle the peptide...
On paper draw a dipeptide, clearly showing the peptide bond joining the two amino acids together. If the two amino acids are valine and threonine, predict the overall charge of the dipeptide at pH 7. Do not forget to consider the amino (N-terminal) and carboxy (C-terminal) of the dipeptide, as well as the R groups. Select one: a. +2 b. -2 c. 0 d. -1 e. +1
1. Draw the dipeptide His-Gly at pH 7.4. 2. Label the amino terminus, the carboxy terminus, the two alpha carbons, and the peptide bond (1pt). 3. Calculate it’s net charge. 4. What is the net charge of this dipeptide at pH = 2? 5. List the levels of protein structure and the types of bonds/interactions that are characteristic of each level.
The cleavage pattern for o-lodosobenzoate is C-terminal to tryptophan; the cleavage pattern for thrombin is C-terminal to arginine. A peptide is digested with o-lodosobenzoate and yields the fragments GRGPRVW, STRL, and W. When the same peptide is digested with thrombin, the resultant fragments are GPR, L, WGR, and VWSTR. What is the sequence of the peptide? Hint: any fragments that do not end in a typical cleavage site are probably the C-terminal ends of the peptide. Trp-Gly-Arg-Gly-Pro-Arg-Val-Trp-Ser-Thr-Arg-Leu Gly-Pro-Arg-Trp-Gly-Arg-Val-Ser-Thr-Arg-Leu O Gly-Arg-Gly-Pro-Arg-Val-Trp-Ser-Thr-Arg-Leu-Top...
What peptide remains after two sequential Edman degradations of the pentapeptide? Ser-Pro-Gly-Phe-Arg Phe-Arg Pro-Gly Gly-Phe-Arg Ser-Pro-Gly Pro-Gly-Phe
A peptide has the sequence Glu-His-Trp-Ser-Gly-Leu-Arg-Pro-Gly a)name the peptide b)what is the net charge of the molecule at Ph 3,8,12 c) Estimate pl
Draw structure of this peptide at pH 7 and at pH 11. Ala-Arg-Asn-Asl-Glu-Ser-Gly Asp*
1. Draw a cis and a trans peptide bond involving glycine (at the N-terminal side of the peptide bond) and a proline (at C-terminal side of the peptide bond).
In the octapeptide, Phe-Ile-Ser-Asp-Gly-Haus-Gly-Tyr, which is the C-terminal amino acid? A) Ser B) Phe C) Tyr D) His E) Gly D) Which molecule is an a-amino acid? A) CH CH3CH2CHCHCOZH NH CH CH2CH2CHCHCONH, CH, ICHCONH B) E) CH, CHYCH,CHCHCO,H CN CH, CH3CH2CHCHNH2 NH2 C) CH CH, CH2CHCHCO,H NH
3) Chymotrypsin acts on the following pentapeptide: Asp-Lys-Tyr-Gly-Ser. Which portion of the peptide will be the first to leave the enzyme? A) Asp-Lys B Tyr-Gly-Ser C) Asp-Lys-Tyr D Gly-Ser
Draw the structure of the dipeptide Lys-Glu at pH 7.0. Label the following: a) Peptide bond b) N-terminus c) C-terminus d) An α-amino group and an ε-amino group e) An α-carboxylate group and a Y-carboxylate group Draw the structure of the dipeptide Lys-Glu at pH 7.0. Label the following: (a). peptide bond, (b). N-terminus, (c). C-terminus, (d). an a-amino group and an e-amino group, (e), an α-carboxylate group and a -carboxylate group.