Concept #1: Protein Quaternary Structure

Practice: Hemoglobin, a four-subunit protein, contains only two different types of subunits and is therefore a:

Concept #2: Quaternary Structure Interactions

Practice: Which of the following statements about protein structure is correct?

Practice: Which of the following correctly orders the protein structural terms from lowest to highest complexity?

Practice: Match each level of protein structure to the appropriate real-world description.

_____ Primary Structure. _____ Secondary structure. _____ Tertiary structure. _____ Quaternary structure.