ism (i. e., Saccharomyces carlsbergensis, or brewer's yeast) and one of its corresponding enzymes. The experiments on this organism and enzyme are not limited to the materials suggested and can be easily adapted to the desired technical level and available budget. Similarly, the subse quent cloning experiments suggest that use of particular vectors and strains, but, as indicated, alternative materials can be used to success fully perform the laboratory exercises. We would like to thank the corporate sponsors of the Biotechnology Training Institute for providing the materials and expertise for...