Gamay Beaujolais was in fact the Napa Gamay. Moreover, Masson's Napa Gamay was found to not be a Gamay at all, but the Valdiguié grape from Languedoc-Roussillon. The US Alcohol and Tobacco Tax and Trade Bureau (TTB) subsequently discouraged the use of the term "Gamay Beaujolais" and ruled that, from 1997, it could only be used as a secondary designation on wines made from more than 75% Pinot noir or Valdiguié. Since April 2007, the term "Gamay Beaujolais" has been banned from labels in the United States. Gamay Beaujolais Gamay Beaujolais is a varietal designation for a Californian grape variety, an early
Petite mutation petite negative mutants. Potentially, these yeasts have a different inheritance system in place for their mitchondrial genome than "S. cerevisiae" does. The frequency at which "S. castellii" spontaneously produces petites is similar to that of "S. cerevisiae", with the mitochondrial DNA of those petites being highly altered via deletion and rearrangement. Suppressive petites of "S. cerevisiae" are the most commonly observed spontaneously created mutants, whereas in "S. castellii," the most commonly observed spontaneous mutant is the neutral petite, further leading to speculation that the transference of this mutation differs between species. Petite mutation petite (ρ–) is a mutant first discovered