1. Locate the RefSeq record for SARS-Cov-2
A. Locate the sequence of the spike protein “S” in the record. What are the values of the CDS coordinates, /product keyword, and the protein_id?
B. Find the structure of the S protein in the PDB (MMDB).
C. How many x-ray structures of this protein are available in the database?
D. What is the stoichiometry of the S protein in the biological assembly?
E. (Extra credit) Include a screenshot of the biological assembly such that all polypeptides in the complex are shown in distinct colors.