This laboratory guide comes at a time when several other method books have already been published in this field. Is this one different from the others? Yes and no. There was no attempt made to be comprehensive. Rather, data were brought to bear on areas where enough competence has been gathered in our laboratories and to complement recent method books (many of which cover extensively various aspects of molecular biology) in those matters which appeared to us somewhat neglected. There was a constant preoccupation and effort to provide miniaturized proce- dures that are both simple and...