Figure 1.

Classification and comparison of proteases in Arabidopsis and Populus. The different colors indicate the different protease classes: threonine proteases (T), cysteine proteases (C), serine proteases (S), metalloproteases (M) and aspartic proteases (A). Each class can be divided into different families according to MEROPS, the family number is indicated between the Arabidopsis and Populus charts.