The influence of nitrogen source on transcript accumulation of (A) AADA, (B) AXOR, (C) AUAY (D) AGDA, (E) AUOR. The A. adeninivorans cells were cultivated in yeast minimal medium with glucose (1%) as carbon source and various purines as nitrogen sources at different concentrations for 24 h. The transcript was analyzed by qPCR. Used markers: (□) adenine, (▴) hypoxanthine, (○) uric acid.