Assertion: phenylalanine's effect | /r/CapableOf | serve as ammonia source
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text: The effect of the reaction medium, serving both as ammonia source and reaction buffer, was tested at 2 mM 2c and 2l using whole cell PcPAL-biocatalysts in cell densities of OD 600 ~ 1 (~6 mg wet cells/mL) in aqueous solutions of different concentrations of ammonia (2, 4, 6 M NH 4 OH pH 10 adjusted with CO 2 ) or ammonium carbamate (2, 4, 6 M NH 4 [H 2 NCO 2 ], pH 9.6–10 without adjustment)