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Production of histamine (bars) and counts (lines) of S. thermophilus PRI60 grown in LM17 under the following conditions: LM17, LM17 with 2% (wt/vol) NaCl, LM170.1 (with 0.1% [wt/vol] lactose), all with and without the addition of 0.1% (wt/vol) histidine.
