(A) The lanes contain one positive control, two negative controls, and the Xf-VapD samples that were treated at 37°C and 90°C. The values are shown in RFU/time units. The curves show that Xf-VapD demonstrated ribonuclease activity at both 37°C, and after heating to 90°C. (B) Lane 1 contains RNA alone, and lanes 2 to 5 contain RNA with Xf-VapD (1 μM, 5 μM, 10 μM and 20 μM, respectively). (C) Lane 1 contains dsDNA (2 kb) alone, and lanes 2 to 3 contain dsDNA (2 kb) with Xf-VapD (20 μM and 50 μM, respectively). (D) Lane 1 contains dsDNA (20 bp) alone, and lanes 2 to 3 contain dsDNA (20 bp) with Xf-VapD (20 μM and 50 μM, respectively). (E) Lane 1 contains ssDNA (26 nt) alone, and lane 2 contains ssDNA (26 nt) with Xf-VapD (50 μM).