Result summary of gel electrophoreses with PCR products. Pictures of the gels were taken after staining with ethidium bromide. They were visually inspected and bands with suitable DNA size were scored (cf. fig. 2). Species identifiers: Hs, Homo sapiens; Gg, Gallus gallus (chicken); Dm, Drsosophila melanogaster; At, Arabidopsis thaliana. Domain abbreviations: Hel, helicase; ATP, ATPase, dsrm, double-stranded RNA-binding motiv. Designations: Species identifier, protein name, short designation of target domain(s).