So we have seen what protein looks like in an egg white and we have seen what proteins can do, but what would a single protein look like?
Of course proteins themselves are far far too small to see with the naked eye. They are too small to see with a microscope, even with a very powerful type of microscope called an 'electron microscope'. However, a technique called x-ray crystallography let's us see the atomic-level make-up of a protein.
Here is a picture of the ovalbumin protein from chicken egg white taken from http://www.imb-jena.de/image_library/PROTEINS/proteins/1ova/.
This is amylase, the enzyme in your saliva which breaks down starch:
As you see, proteins are rather beautiful! There is lots of information on proteins on the web. When people work out the structure of a protein, they deposit the information in the 'Protein Databank' (PDB). You can visit the PDB and download the information for any of the known protein structures. You can download a free program called RasMol from http://www.rasmol.org/ to view the files you download from the PDB.
There is also a classification of proteins which you can browse and view pictures called CATH.