CC-338 r1 mt+Locus: linkage group unknown
Source: Isolated by Andy Wang in the Boynton-Gillham laboratory ca. 1974.
Comment: The r1 mutation enhances the accumulation of protoporphyrin by brs1 mutants. This strain carries the r1 mutation alone, and has no obvious phenotype. Unlike the double mutant r1 brs1, it is not light-sensitive.