The nucleotide sequence of the gene from which messenger RNA mole- cules
are transcribed is in a form that can be translated by cellular
ribosomes into the amino acid sequence of a particular polypeptide, the
product of the gene. The discovery of messenger RNA more than twenty
years ago led to a series of studies on its organization and function in
cells in the presence of infecting viruses. This volume is devoted to
current studies in the field of cellular and viral messenger RNA. The
studies presented provide an insight into molecular and genetic aspects
of messenger RNA. Special attention was paid by the authors to the
molecular organization of mRNA species, to the processing of mRNA
molecules, and to the different strategies employed by DNA and RNA
viruses in the synthesis of their mRNA. The ability of a virus to take
over the protein-synthesizing mechanisms of an infected cell depends on
its ability to produce mRNA molecules which can affect the host mRNA or
utilize cellular components more efficiently. The differences between,
and similarities of, the strategies of mRNA synthesis devised by various
DNA and RNA viruses are described herein. This book should be of
interest to all students of cellular and viral genes and scientists in
the field. It is suitable as a textbook for workshops and courses on
mRNA. I wish to thank the authors for their fine contributions and for
their interest.