Question

Biochemistry! Please read the whole question before answering. And please explain.

1. Read both parts A and B of question 1 before you answer either one. Draw a peptide backbone that extends for three amino acids. Label the psi, phi and omega angles, showing the direction of rotation. Indicate resonance. Draw the structure with the more likely cis or trans conformation. Indicate side chains with the letters R1, R2 and R3. A. B. Draw a second peptide below the one you drew above. Connect the two peptides by hydrogen bonding as in a P-pleated sheet. Indicate whether you are drawing a parallel or antiparallel sheet (the choice of which to draw is yours). Indicate whether the hydrogen bonds are stronger or weaker in the type of β-pleated sheet you have drawn. C. What types of structures often connect strands of B-pleated sheets? D. What 2 amino acids are frequently found in the structures in "C" abovei?

Answer 1