The Primary Structure of Mammalian Hemoglobin,an $\alpha$ ₂ $\beta$ ₂ Tetramer,is Approximately _____ Identical to Myoglobin

Multiple Choice

The primary structure of mammalian hemoglobin,an $\alpha$ ₂ $\beta$ ₂ tetramer,is approximately _____ identical to myoglobin.

A) 2%
B) 18%
C) 50%
D) 78%
E) 98%