The cause of the change in nuoleolar BNA compoeition is un- known and may be the result either of changed proportions between different RNA fraotions, known to exist here (Vinoent, 1954; Sibatani et al. 19621 Adams and Busoh, lY62), or of --
The cause of the change in nuoleolar BNA compoeition is un- known and may be the result either of changed proportions between different RNA fraotions, known to exist here (Vinoent, 1954; Sibatani et al. 19621 Adams and Busoh, lY62), or of --