Figure 1.

Structure of the mature form of galactose oxidase (Upper Left) and the precursor form (Upper Right). Domain I is red, domain II is blue, and domain III is purple. In the precursor form the N-terminal pro-sequence is green, and regions that differ from the mature structure by more than 2 Å are yellow. The sequence of galactose oxidase (14) is shown (Lower) and colored as above. The pro-sequence residues are numbered −17 to −1. All figures were produced by using spock (45).