TABLE 1.

Concentrations of substrates and end products of fermentations by L. sanfranciscensis in media with various sucrose and fructose contents

Substrate or end product (unit)	Result with fructose concn (g/liter) of:
	15						5
Sucrose (g liter−1)	20a	30	60	70a	120a	160a	20a	60	90a
Measured sucrose at t = 0 (mmol liter−1)	69	92	170	214	356	481	56	170	263
Consumed sucrose at t = end (mmol liter−1)	−68b	−91	−109	−112	−160	−245	−58	−105	−141
Lactate (mmol liter−1)	74	86	73	97	103	137	62	98	67
Acetate (mmol liter−1)	50	55	57	56	52	62	25	25	24
Mannitol (mmol liter−1)	98	107	111	100	99	104	38	43	49
Fructose (mmol liter−1)	−75b	−86	−73	−72	−79	−81	−22	−22	−30
Glucose (mmol liter−1)	0	0	12	6	13	6	0	0	0
Ethanol (mmol liter−1)	29	25	14	39	40	65	41	66	38
Glucose recoveryc (%)	108	95	78	87	73	58	104	93	48

^aValues in these fermentations are representative of two independent experiments; the coefficient of variation between the two fermentations was generally in the range of 5 to 12%.

^bNegative values indicate consumption; positive values indicate production of metabolites.

^cRecovery of the glucose moiety from sucrose consumed in the end products: glucose, lactate, and acetate or ethanol.