Isolation of the nuclear gene encoding a subunit of the yeast mitochondrial RNA polymerase.

Antisera directed against the purified 145,000-dalton subunit of the Saccharomyces cerevisiae mitochondrial RNA polymerase have been used to immuno-screen a library of yeast genomic inserts constructed in the fusion protein expression vector, lambda gt11. A 4-kilobase pair yeast DNA fragment inserted into one of the recombinant bacteriophages appears to contain most or all of the gene that encodes the 145,000-dalton subunit.