Drosophila SNF/D25 combines the functions of the two snRNP proteins U1A and U2B' that are encoded separately in human, potato, and yeast.
M Polycarpou-Schwarz, S I Gunderson, S Kandels-Lewis, B Seraphin, and I W Mattaj
RNA. 1996 January; 2(1): 11–23. PMCID: PMC1369347