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Micro-Guard Cation H Refill Cartridges

微保护阳离子H填充墨盒

Company: Bio-Rad Laboratories
Catalog#: 1250129
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HPLC Analysis of Secreted Organic Acids
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2016-04-20
[Abstract]  Under certain growth conditions some microorganisms secrete organic acids into the extracellular medium to relieve the accumulation of excess energy carriers, and/or to reduce toxic concentrations of organic acids. For example, a glycogen-deficient ∆glgC mutant of the cyanobacterium Synechococcus sp. PCC 7002 secretes pyruvate, acetate, α-ketoglutarate, α-ketoisocaproate and succinate (Davies et al., 2014; Jackson et al., 2015). Secretion of these organic acids functions as a putative energy-spilling mechanism in the absence of glycogen, the major carbon and reductant sink in this organism. Identification of secreted organic acids can facilitate the design of metabolic engineering strategies that funnel over-accumulating organic acids towards metabolic ... [摘要]  在某些生长条件下,一些微生物将有机酸分泌到细胞外介质中以减轻过量能量载体的积累,和/或降低有机酸的有毒浓度。例如,蓝细菌聚集球菌属的糖原缺陷型ΔemggC 突变体。 PCC 7002分泌丙酮酸盐,乙酸盐,α-酮戊二酸盐,α-酮异己酸盐和琥珀酸盐(Davies等人,2014; Jackson等人,2015)。这些有机酸的分泌在不存在糖原的情况下作为推定的能量溢出机制起作用,主要碳和还原剂在该生物体中下沉。分泌的有机酸的鉴定可以促进代谢工程策略的设计,其将过量积聚的有机酸朝向产生感兴趣的产物(例如生物燃料)的代谢途径。在这里,我们描述了使用高效液相色谱(HPLC)分析胞外介质中分泌的有机酸的方法。该方法被开发用于分析由光合微生物(蓝细菌和藻类)分泌到培养基中的有机酸,但是可以用于分析在液体培养基中培养的任何微生物分泌的有机酸。

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