mfdes
Well-Known Member
- Joined
- 6/7/07
- Messages
- 577
- Reaction score
- 2
I have often read that US-05 (US-56) from Fermentis is the same strain of yeast as Wyeast 1056. I have used both, though not 1056 for a while, and vaguely remember 1056 to have been slightly cleaner than US-05.
The explanation I've been given is that the drying process used to make any dry yeast inherently introduces contaminants. Is this still so? US-05 seems remarkably clean and stable compared to any dried yeast strains I tried a few years ago.
My ultimate question, I guess, is this: I culture my own yeasts as I have access to a laminar flow cabinet, an autoclave and a -70 degree ultrafreezer. If I plated US-05 in an agar plate and selected a single-cell colony, thereby growing a pure strain culture, would I have the same strain as Wyeast 1056? Is it worth it? I don't want to fork out the extra money to buy a pure culture of 1056 to culture if the strain I obtain from US-05 is identical.
Cheers,
MFS
The explanation I've been given is that the drying process used to make any dry yeast inherently introduces contaminants. Is this still so? US-05 seems remarkably clean and stable compared to any dried yeast strains I tried a few years ago.
My ultimate question, I guess, is this: I culture my own yeasts as I have access to a laminar flow cabinet, an autoclave and a -70 degree ultrafreezer. If I plated US-05 in an agar plate and selected a single-cell colony, thereby growing a pure strain culture, would I have the same strain as Wyeast 1056? Is it worth it? I don't want to fork out the extra money to buy a pure culture of 1056 to culture if the strain I obtain from US-05 is identical.
Cheers,
MFS