Original experimental article, Cell46(6),827–835(1986), DOI10.1016/0092-8674(86)90064-4. Institutional primary abstract: co-transfection of mutant adenovirus E1A and human U1 genes, efficient rescue at donor position+5 but weak rescue at another site position+3; base pairing necessary but insufficient. Published initials retained; no expansion of Weiner identity inferred.