Convergent evolution…

Secondary structures of proteins are predominantly stabilized by hydrophobic interactions.

Besides D and L isomers, glyceraldehyde also exists in α and β forms.

Fetal hemoglobin (α2γ2) can easily extract oxygen from maternal hemoglobin (α2β2) because the fetal hemoglobin:

The decrease in pH at the tissue level helps to:

The structure of a protein is partially dictated by the properties of the planar peptide bonds.

In the α2β2 oligomeric structure of hemoglobin, a single αβ unit is known as:

The equilibrium between the T and R conformational states of oxygenated hemoglobin is shifted to the T state:

Domains are independently folded tertiary structural elements of proteins, which often possess specific functions.

In primary structures of proteins, amide bonds are also known as peptide bonds.