I only use the Difco YNB. However, if you buy the ammonium sulfate
separately it is much cheaper. The difference in price for 100 gms is
less than two. With YNB complete you weigh out 6.7 g/l of which 5 gms is
approximately ammonium sulfate. Buying them separately saves some money
On 7 Nov 1995, rajesh K. Mehra wrote:
> I am looking for an inexpensive source of yeast nitrogen base.
> Information on reliable suppliers will be greatly appreciated.