3. d.255.1 Tombusvirus P19 core protein, VP19 Tombusvirus P19 core protein, VP19 beta(2)-alpha-beta(2)-alpha; 2 layers: alpha/beta; antiparallel sheet: order 2134 1rpu d1rpua_ A:9-21,58-66,67-75,91-103,129-147 1rpu d1rpub_ B:8-21,57-66,67-76,91-103,129-147