Gravar-mail: Acetyl Coenzyme A Synthetase (ADP Forming) from the Hyperthermophilic Archaeon Pyrococcus furiosus: Identification, Cloning, Separate Expression of the Encoding Genes, acdAI and acdBI, in Escherichia coli, and In Vitro Reconstitution of the Active Heterotetrameric Enzyme from Its Recombinant Subunits