The 35th N: osbach Colloquium "The Impact of Gene Transfer Techniques in Eukaryotic CeU Biology" brought together a number of speakers interested in various aspects of cellular and developmental biology and over 600 other scientists, who listened to the lectures and participated in the lively discussions. The questions and experiments described were very varied, but all of them illustrated the importance of recombinant DNA technology. The powerful techniques of identifying and isolating DNA sequences, followed by their introduction into living cells and even into the germ cells of...

The topic of this years' osbach Colloquium was DNA integration. We have tried to bring together experts from different fields of research who are studying natural processes by which DNA molecules from differ ent sources are linked. It has been known for a long time that such linkage occurs between the chromosomes of bacteriophages and plasmids on the one hand and the chromosome of the bacterial host on the other. This process has been especially well studied in bacteriophage A. Since it is controlled in a complicated way, we began with a lecture by M. ptashne on these regulatory processes. H....