期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 13, 页码 6982-6989出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.04.032
关键词
Citric acid; Invertase; Yarrowia lipolytica; Sucrose; Glycerol
Simultaneous production of citric acid (CA) and invertase by Yarrowia lipolytica A-101-856-5 (SUC+ clone) growing from sucrose, mixture of glucose and fructose, glucose or glycerol was investigated. Among the tested substrates the highest concentration of CA was reached from glycerol (57.15 g/L) with high yield (Y-CA/S = 0.6 g/g). When sucrose was used, comparable amount of CA was secreted (45 g/L) with slightly higher yield (Y-CA/S = 0.643 g/g). In all cultures amount of isocitrate (ICA) was below 2% of total citrates. Considering invertase production, the best carbon source appeared to be sucrose (72 380 U/L). The highest yield of CA and invertase biosynthesis calculated for 1 g of biomass was obtained for cells growing from glycerol (9.9 g/g and 4325 U/g, respectively). Concentrates of extra- and intracellular invertase of the highest activity were obtained from sucrose as substrate (0.5 and 1.8 x 10(6) U/L, respectively). (C) 2011 Elsevier Ltd. All rights reserved.
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