Tertiary structure is the 3-D folding of a polypeptide chain, and quaternary structure is simply several chains folded into tertiary structure all tangled up together.

The four levels of protein structure are primary, secondary, tertiary, and quaternary. It is helpful to understand the nature and function of each level of protein structure in order to fully understand how …

Now, any protein that's made up of a single polypeptide is only going to have primary structure, secondary structure and tertiary structure, but if we're dealing with something like hemoglobin, that's …

The process of going from primary structure to tertiary or quaternary structure establishes a protein's final shape, chemical properties, and cellular functions.

Below we delve more into the interactions that stabilize the tertiary structure (overall fold) and quaternary structure (interactions between subunits) of proteins.

Just as each type of protein has its own unique primary and secondary structure, it also has its own unique tertiary structure. The quaternary structure of a native conformation refers to the three …

So as you can see, the conformational stability of a protein depends not only on all of these interactions that contribute to primary, secondary, tertiary, and quaternary structure, but also what sort of …

So, as you can see, the conformational stability of a protein depends not only on all of these interactions that contribute to primary, secondary, tertiary, and quaternary structure, but also what sort of …

Now, any protein that's made up of a single polypeptide is only going to have primary structure, secondary structure and tertiary structure, but if we're dealing with something like hemoglobin, that's …

How does a protein go from a folded chain to a fully functional biological machine? In Part 2, we dive deeper into the tertiary and quaternary levels of protein structure.