The molecule to the left is the finished product of the protein crystallization and computer data analysis.  This molecule includes gp-120 bound to CD4 and the interaction of the human antibody Fab 17b with the complex.
 
 
 
 
 
 

To the untrained eye the molecule above can be difficult to decipher.  To the right is the same molecule with each of the four sub units highlighted in a different color.  Here red corresponds to gp-120, yellow corresponds to CD4, while blue and green indicate the two different chains of the human antibody.  Just click on a the sub unit name to take a closer look.