A researcher has synthesized an oligopeptide "SLISRAEKLAGVRVGV" and needs to confirm whether the peptides were synthesized with the correct sequence using mass spectrometry. PART A.) What is the sequence of the y6 and b8 ions when the peptide is running tandem MS MS on the structure. PART B.) This peptide is digested with trypsin. What peptide fragments will result?

Past paper question

The isoelectric point (pl) can best be calculated by: Averaging the sums of all pkas. Averaging the sum of the two pKas closest to physiological pH. Averaging the two pKas "sandwiching" the zwitterionic form. Averaging the two pKas of the alpha-amino and alpha-carboxy groups.

d. réčombinants 20. What functional group is found on every amino acid not in a zwitterion form? a. -SH b. -NH, C. -C- d. -S-S- e. no correct response is given 21. The peptide linkage that bonds the monomers together in proteins is also corr

Question is in image.

1 Submit Q10. !! Unanswered Q10. An average amino acid is about 110 Da (Daltons). If there are 1273 amino acids in the SARS-CoV-2 spike protein, what do you expect the mass of spike to be? How does that compare to the expected mass of about 200 KDa? more than expected by about 90 Da Less than expected by about 90 Da B. more than expected by by about 60 KDa less than expected by about 60 KDa Submit odf 0/11 answered

Question 2.1 H-N H. 4-0 H. Write (without any spaces or dashes) the 1-letter amino acid sequence which corresponds to the peptide shown above [answer1]

Chemistry 2. Draw the peptide with the sequence YNEM at pH 7.4 (use dashes and wedges to convey proper stereochemistry). Label the N-terminus and the C-terminus. 3. What is the net charge of YNEM peptide at pH 7.4? Do you predict YNEM will be soluble in aqueous solution at pH 7.4? Why (~1 sentence)?