A bacterial cell that synthesizes a protein containing the antigenic determinants of rat prolactin

Immunochemical identification of products of the mitochondrial cytochromoxidase gene expressed in E. coli cells

Bacterial clones containing hybrid plasmids with mitochondrial DNA insertions were obtained. Among them, a clone synthesizing immunoreactive protein with molecular weight 45,000 was discovered by means of antibodies against mitochondrial cytochromoxidase. The synthesis of the protein depended on orientation of the mitochondrial DNA insertion in the hybrid plasmid. The size of the protein was in excess of the coding capacity of the insertion, which speaks of chimeric nature of the protein. Absorption of the protein by the immunoglobulin fraction containing antibodies against cytochromoxidase resulted in a loss of antibody binding to cytochromoxidase subunit III.

Expression in E. coli of maize and wheat chloroplast genes for large subunit of ribulose bisphosphate carboxylase

Synthesis of the large subunit polypeptide of ribulose bisphosphate carboxylase can be detected in Escherichia coli cells containing the chloroplast genes from maize and wheat. The chloroplast DNA sequences contain a 'promoter' that, in Escherichia coli, initiates transcription and translation of the genes. This synthesis of large subunits has been substantially increased using the powerful lambda promoter, PL, to drive transcription of the maize gene.