Entry retrieved from the Protein Data Bank at RCSB.

1HKG Transferase. Date: Dec 22, 1980.
Authors: W.S.Bennett Junior, T.A.Steitz.
Compound: Hexokinase A.
Source: Yeast (Saccharomyces Cerevisiae)
Method: X-Ray Diffraction. Resolution 3.5 Ang.

The enyzme isdisplayed as "ribbons" and the color is selected so as to show the "groups". Look at the molecule for a while and try to get a feeling for the shape of this enzyme. In the next item, you will find the structure of the complex formed between hexokinase and glucose.