17. Shown below is the synthesis of the dipeptide Gly-Val. Identify the reagents in their correct order for the steps involved. Put a letter in each box. (9pts) HO H2N' BocHN HO CO2CH3 + NH2 H N. .N. -BocHN H2N O2 CO2CH3 A 1. PHNCS 2. TFA E 1. TFA 2. H3O* 1. 20/Et3N C 1. TFA 2. NAOH D DCC 18. Hydrolysis of a peptide with trypsin and chymotrypsin gives the following fragments. Determine the correct sequence of the peptide. (3pts) Trypsin: Q-L-M-T-W-H-S-R and A-N-C Chymotrypsin: Q-L-M-T-W and H-S-R-A-N-C A Q-L-M-T-W-Q-L-M-T-W-H-S-R C S-R-A-N-C-Q-L-M-T-W-H B Q-L-M-T-W-H-S-R-A-N-C D A-N-C-Q-L-M-T-W-H-S-R