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.

Ramchandran plots are used to assess the possible conformations of secondary structural elements in peptides.

The C-N bond length of a peptide is longer than that found in methyl amine (CH3-NH2).

An increase in dissociation constant (Kd) implies a decrease in the binding affinity of a protein to its ligand.

The side chain of Lys (pKR =10.5) will be positively charged at pH:

Buffers work best when their pH values are equal to the pKa values of their weak acids.

Cation exchange resins contain positive charges.