Expression control sequences are provided for the expression of proteins from a gene of interest. The gene may express viral, prokaryotic, or eukaryotic proteins. These control sequences are produced by combining phage promoter and operator/repressor systems. Expression vectors containing such expression control sequences, microorganisms transformed with such expression vectors and methods for producing viral, prokaryotic, and eukaryotic proteins using the expression control sequences, expression vectors and transformed microorganisms are also provided.