We have several casein digests that could serve as alternatives to Bactone Tryptone (Cat. No. 211699, 211791, 211705), including Bacto Casitone (Cat. No. 225930, 225910), Difco Tryptone Peptone (Cat. No. 21921, 211922, 211923), BiTek Tryptone (Cat. No. 251420). However, the digestion and nutritive profile of each peptone are different, therefore there may be differences in bacterial growth or supplementation ability. We recommend empirically determining the performance of alternative casein digestion in your application.
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