White Labs Bavarian Weizen Yeast (WLP351) White Labs

Special Strain Note From White Labs:
This strain has been genetically typed in our lab using polymerase chain reaction (PCR). Through this genetic testing, we have determined WLP545 Belgian Strong Ale Yeast to contain the STA1 gene (glucoamylase), a potential indicator of Saccharomyces cerevisiae var. diastaticus. Brewers yeast are natural hybrids, which make it possible for certain strains to display elements of the STA1 gene. These strains have the ability to utilize some dextrins (unfermentable sugars), resulting in higher levels of attenuation than what is considered typical.

At White Labs, we do everything possible to detect for undesired organisms within our process and cultures. The strains we carry with known Saccharomyces cerevisiae var. diastaticus genetics have been researched and validated to perform without excessive over-attenuating, which is possible through our nearly 25 years of experience paired with internal and external fermentation data.

YEAST CULTURING:
Each vial of White Labs liquid yeast is designed to be used directly in 5 gallons, hence the term ‘pitchable yeast’. Each vial is equivalent in cell count to a pint starter, or 75-150 billion cells. One vial will usually start fermentation in 5 gallons in 5-15 hours at 70°F. If a faster start is desired, or if initial gravity is over 1.070, we recommend a 1-2 pint starter be made. If a starter is made from a fresh vial, one vial can be added directly to a 2 liter starter, which in 2 days will grow to approximately 240 billion cells, to achieve a pitching rate in 5 gallons of of 1 million cells per 1mL per 1° Plato (with a 12° Plato beer).

DIRECTIONS:
Store in refrigerator until use, do not freeze. Remove 2 hours prior to addition and let warm to room temperature (~70°F). This makes re-suspension in the vial easier, and prevents a temperature shock when added to wort. Remove the shrink wrap on cap, shake the vial well to re-suspend yeast, and open cap carefully. Pour into fresh, aerated wort (by shaking fermentor for 15 minutes or injection though an aeration stone) at 70-75°F. The first sign of fermentation will be a raised airlock, then wisps of foam will start to cover the top of the wort. A full, thick krausen will be evident 1-2 hours after this. Be careful to leave enough head space in the fermentor, or use a blow off tube because some fermentations will be very active, and it is not unusual for a 5 gallon fermentation to blow the airlock off a 6.5 gallon fermentor! When fermentation activity subsides, check the gravity. If fermentation is complete, bottle the beer or transfer the fermentor to 40°F for 1 week to cold condition. Bottling or transfer to cold should take place 14 to 30 days after brewing.