Figure 4. The extracellular products of T. denticola [U-¹³C]glycine fermentation.

[U-¹³C]glycine (5.00 mM) was added to a 24 h T. denticola culture and aliquots were collected every 24 h, filtered and the identity and the quantity of the ¹³C-labeled compounds was determined using NMR spectroscopy. black cross, [U-¹³C]glycine; black circle, [U-¹³C]acetate; black inverted triangle, dual or uniformly-labeled lactate; black triangle, [U-¹³C]bicarbonate; white circle, dual or uniformly-labeled alanine.