📅 NSB 2012🎓 HS🔄 Round 2#️⃣ Q13❓ TOSS-UP✍️ Short Answer
What is the highest level of protein structure present in collagen, a fibrous protein with three discrete helical polypeptides [HEL-i-kuhl pol-ee-PEP-tyds] supercoiled into a triple helix?
✔️Answer:QUATERNARY
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