What is the function of the resin particle in solid-phase peptide synthesis? Holding the amino acid O Activating amino terminals O Peptide release O Blocking carboxyl terminals

The biosynthetic pathway for the two amino acides E and H is shown schematically in the Figure below: A W E 2 Z H How would this pathway change if C was mutated and non-functional?

A new amino acid is found with the alpha N and backbone COOH pKa's the same as histidine but with a neutral side chain. What is the isoelectric point of this new amino acid?

If you discover a peptide that has a glycine at the N-terminus what can that tell you about peptide processing? O The peptide hormone must be processed from a precursor since all new proteins have a methionine at the N-terminus The N-terminus must be processed by methylation by adoMet O The peptide must be from bacteria since all bacterial peptides begin with the amino acid glycine The N-terminus is phosphorylated by the action of an N-terminal kinase

A researcher has synthesized two peptides and needs to confirm whether the peptides were synthesized with the correct sequence using mass spectrometry. What is the sequence of the b4 and y7 ions for peptide GAMECHANGER?  The peptide SLISRAEFLAGVRVGV is digested with trypsin. Then the products of the digestion are subjected to ESI TOF-MS in positive ion mode with the peptides in a pH 2 solution. What peptide fragments will result and what are their m/z?

What molecule facilitates the bending of the ER membraane when a COPII-coated vesicle is formed on the surface of the ER?