Since the first edition of Complement in Health and Disease was
published in 1986, significant advances have been made. The cDNAs for
all of the components and some of the receptors have been cloned and
sequenced. The chromosomal localization and the structural organization
of a number of these genes have now been determined. These advances are
now facilitating research into the structure of the complement proteins,
the nature of the complement deficiency syndromes, the regulation of
complement gene expression and the role of complement in different
diseases. This edition contains contributions from both basic and
clinical scientists in a format which we hope will appeal to both
immunologists and physicians who wish to know more about this
fascinating and important host defence system. The introductory chapter
by John Weiler presents a historical background to research on the
complement system and describes the biochemical events occurring during
activation of the system. In Chapter 2 Alastair Dodds and Tony Day
discuss the phylogeny and evolution of the complement system. The
techniques of protein chemistry and molecular biology have provided
powerful insights into the modular structure of complement proteins and
the evolution of the complement system. The structure and organisation
of the complement genes is described in Chapter 3 by Ken Reid and Duncan
Campbell. This chapter describes the modular structure of the complement
proteins and some of the mutations which are responsible for
deficiencies of individual components.