Table 3. Potential sources of glycine for Ca. P. ubique when grown in AMS1 with 50 μℳ pyruvate and 10 μℳ methionine.

Potential glycine source	Maximum densitya	Growth rateb
Glycine betaine	13.1±0.34	0.18±0.01
Glycine (positive control)	10.2±0.28	0.38±0.01
Serine	8.34±0.15	0.40±0.01
Glycolate	1.88±0.13	0.35±0.01
Acetate	0.66±0.10	0.30±0.01
Malate	0.51±0.03	0.32±0.03
Glyoxylate	0.50±0.01	0.38±0.01
Succinate	0.46±0.06	0.31±0.01
Pyruvate	0.44±0.05	0.35±0.01
Citrate	0.44±0.01	0.29±0.01
No glycine (negative control)	0.43±0.02	0.34±0.00
2-Oxoglutarate	0.39±0.05	0.33±0.01

^aPresented as mean±s.d. × 10⁷ cells ml⁻¹, n=3.

^bPresented as mean±s.d., cells day⁻¹, n=3.