Figure 2From: Activity of the Bacillus anthracis20 kDa protective antigen component SDS-Page analysis of the 83 and the PA 63 and PA 20 fragments. PA/Factor Xa was purified from WB600 PYS1Xa2FN1 (Lane 1). The purified protein was digested with Factor Xa protease (Lane 2) resulting in PA63 and PA20 fragments; Wild type control PA83 treated with Factor Xa protease did not result in PA fragments (Lane 3).Back to article page