Feedback for Multiple Choice Quiz 6
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- After reaction with CNBr, peptides are cleaved following internal Met residues. The C-terminus is a modified Met residue; see p. 125.
- Chymotrypsin is specific for cleavage after the large aromatic residues, e.g. Phe, Tyr, and Trp.
- Figs. 4.2 is a good illustration of H-bond geometry in a-helices. H-bonds are about 3Å in length. Nothing is more numerous in proteins than van der Waals interactions!
- b-sheeets are pleated, not flat. The H-bond geometry between b-strands is shown in Figs. 4.4 and 4.5.
- Only the secondary structure is determined, i.e. the conformation of the mainchain or backbone. Tertiary structure includes the positions of all of the side chains.