|Figure 1-2 A computer simulation of the three-dimensional structure of the lysozyme protein (A), which is used by animals to destroy bacteria. The protein is a linear
string of molecular subunits called amino acids, connected as shown in B, that fold in a three-dimensional pattern to form the active protein. The white balls
correspond to carbon atoms, the red balls to oxygen, the blue balls to nitrogen, the yellow balls to sulfur, the green balls to hydrogen, and the black balls
(B) to molecular groups formed by various combinations of carbon, oxygen, nitrogen, hydrogen, and sulfur atoms that differ among amino acids. Hydrogen
atoms are not shown in A. The purple molecule in A is a structure from the bacterial cell wall that is broken by lysozyme.