A small informal symposium on "Molecular Genetics" was organized by us on behalf of the "Gesellschaft Deutscher Naturforscher und Arzte" and took place in Berlin in October 1967. There were about 40 partici- pants from Europe and the United States. Molecular Genetics represents today an extraordinarily comprehensive research field. Therefore the organizers of the symposium had the choice either of limiting the meeting to a particular topic or of covering a wider selection of current problems. The latter alternative was chosen. The fields of research of the participants covered the broad range...