YM Agar and YM Broth are used for cultivating yeasts, molds and other aciduric microorganisms.
  YM Broth and YM Agar can be acidified to pH 3.0-4.0 to be used as a screening and  enrichment medium for yeasts from populations also containing bacteria and molds.

Composition：(In 21g YM broth/1L H2O)