LIST OF TABLES Table pM,,e 2-1. Bacterial strains. 29 2-2. Conditions under which polyhedral organelles are formed . 35 3-1. Bacterial strains. 59 4-1. Diol dehydratase activity during organelle purification. 103 4-2. Propionaldehyde dehydrogenase activity during organelle purification. 104 4-3. Organelle proteins identified using N-terminal sequencing . 110 4-4. Organelle proteins identified by peptide mass fingerprinting . 112 4-5. Molecular mass, pl, and densitometry analyses . 117