RT Journal Article SR Electronic(1) A1 Rosypal, S. A1 Kocur, M. A1 Hodák, K.YR 1963 T1 A Study of Violet-pigmented Micrococci. Yellow-pigmented Mutants of Staphylococcus flavocyaneus JF Microbiology, VO 32 IS 2 SP 189 OP 194 DO https://doi.org/10.1099/00221287-32-2-189 PB Microbiology Society, SN 1465-2080, AB SUMMARY: Staphylococcus flavocyaneus produces at least two pigments on glucose yeast-extract agar; a violet diffusible pigment and a yellow non-diffusing pigment. On some media the production of violet diffusible pigment is inhibited. In broth cultures of this organism a mutation takes place giving rise to yellow-pigmented mutants which have lost the ability of producing the violet pigment. A considerable accumulation of these mutants occurs in cultures on both solid and liquid media. No reversion to the violet-pigmented state or other change in pigmentation in the mutants has been observed. The yellow-pigmented mutants do not differ from strains of Micrococcus luteus with the exception of some characteristics which are variable within that species. This supports the conclusions of Kocur & Martinec (1963) that Staphylococcus flavocyaneus Knaysi should be regarded as a strain of Micrococcus luteus (Schroeter) Cohn., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-32-2-189