FIG. 5.

³¹P NMR spectra of immobilized A. niger NW131 mycelium in the presence of 25 mM citrate-phosphate buffer (pH 4.0) before (A) and after (B) the addition of 3.0 mM sorbic acid. The peaks can be assigned to the following compounds: 1, inorganic phosphate standard; 2, sugar phosphomonoesters; 3, sugar phosphodiesters; 4, cytoplasmic inorganic phosphate; 5, vacuolar inorganic phosphate; 6, extracellular inorganic phosphate; 7, γ-ATP; 8, pyrophosphate; 9, α-ATP; 10, NAD(H) and uridine diphosphoglucose; 11, uridine diphosphoglucose (second peak); 12, β-ATP; 13, penultimate phosphates of polyphosphate; 14, polyphosphate.