Twisted Oak Winery Murphys is open year round. The winery also has its own wine club, which it calls "The Twisted Few". Twisted Oak Winery produces both red and white wines made from the grape varieties native to Spain and southern France. White wines include varietal Viognier and Verdelho bottlings as well as blends made from Marsanne, Rousanne, and Viognier. The winery has produced one rosé made from Grenache. The winery's signature red wine bottling, The Spaniard, is a blend of Tempranillo, Grenache, and Graciano grapes. Other red bottlings include varietal Tempranillo, Syrah, Petite Sirah, and Grenache bottlings, as well as red blends
Petite mutation Petite mutation petite (ρ–) is a mutant first discovered in the yeast "Saccharomyces cerevisiae". Due to the defect in the respiratory chain, 'petite' yeast are unable to grow on media containing only non-fermentable carbon sources (such as glycerol or ethanol) and form small colonies when grown in the presence of fermentable carbon sources (such as glucose). The petite phenotype can be caused by the absence of, or mutations in, mitochondrial DNA (termed "cytoplasmic Petites"), or by mutations in nuclear-encoded genes involved in oxidative phosphorylation. A neutral petite produces all wild type progeny when crossed with wild type. petite mutations can