Collagen is the most abundant protein (structural protein) in the animal world while Ribulose Bisphosphate Carboxylase Oxygenase (RUBISCO) is the most abundant protein in the whole of the plant world.
Which one is the most abundant protein in the animal world?
Held on 30 Apr 2012 · Verified 9 Jul 2026.
Trypsin
Haemoglobin
Collagen
Insulin
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