The Following Is an Example of _____ $\alpha$ Helix
B) Parallel $\beta$

Q19: Which of the following amino acids has

Q20: The only observable regular secondary structures

Q21: Serine has a _ side chain; valine

Q22: At a pH above its pK_a,

Q23: The formation of a dipeptide from

Q25: Which of the 20 standard amino acids

Q26: Which of the following best describes

Q27: Disulfide bonds form between two residues of

Q28: What level of protein structure is characterized

Q29: Heme is considered a _.<br>A) catalyst<br>B) prosthetic