Which one is not an example of supersecondary structure?

Name: Which one is not an example of supersecondary structure?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The pyrrole ring is not an example of a supersecondary structure; it is a chemical structure found in many biological molecules, such as heme. Supersecondary structures refer to specific arrangements of secondary structures (like α-helices and β-sheets) in proteins, examples of which include the Greek key, the β-meander, and the β-barrel.

Which One Is Not an Example of Supersecondary Structure