Problem 3. (20 points equally split for each question.) The following plot shows the amino acid contacts for a 41-residue protein. The contact plot is for backbone atoms within 5 A. (A) Assign the protein secondary structure. Denote the beginning and ending amino acid for each element of secondary structure. Numbering does not have to be exact since there are no minor tick marks in the plot. (B) Sketch a two-dimensional representation of the tertiary structure of the protein giving the relative spatial arrangements of the α-helices and β-strands. lgnore or speculate for extra credit, :- III 20 30 Seq.0 Problem 4. (40 points; 1 point per question.) See multiple-choice questions at the back of the exam. Use a scantron card for your answers.