Tertiary and Quaternary structure of proteins

https://www.youtube.com/watch?v=W0TkmHl27jE

What is the tertiary structure

The overall 3d shape of a polypeptide chain

Contains five alpha helices, wrapped in a very specific pattern around the beta pleated sheet.

What does quaternary structure show

Polypeptides forming a large molecule are called subunits

Quaternary structure shows how the individual subunits are arranged, to form a larger 3d structure
Quaternary structure only applies to proteins with at least 2 subunits

What are prosthetic groups

When some proteins contain other non protein molecules forming part of structure, theyre prosthetic groups, they help protein to carry out its role.

Proteins with prosthetic group are called conjugated proteins

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