L-苏糖酸钙为白色颗粒状粉末,几乎无臭无味。它能溶于水,易溶于热水,但不溶于醇、醚及氯仿。熔点高于330℃(分解),耐酸碱性好,热稳定性强,在120℃加热20分钟或在200℃加热10分钟后仍无变化。L-苏糖酸广泛存在于植物体内、人的胃酸及尿酸中,它是L-抗坏血酸的一种降解产物。
作用L-苏糖酸钙可作为营养强化剂和补钙剂使用。
化学性质白色微细颗粒状粉末,无臭无味。它溶于水而不溶于无水甲醇、无水乙醇及乙醚,并易吸湿。
用途由抗坏血酸和钙盐中和后精制而成。
Domain of unknown function (DUF) families constitute 3,892 of the 16,295 families in the Pfam database (release 29.0). Given their biological importance, large-scale strategies are required to accomplish their functional assignments. Here, we illustrate an integrated “genomic enzymology” strategy to identify diverse functions within the DUF1537 family (PF07005). We combined high-throughput ligand screening results for transport system solute binding proteins with the synergetic analysis of sequence similarity networks and genome neighborhood networks to establish that the members of the DUF1537 family are novel ATP-dependent four-carbon sugar kinases. This study illustrates the utility of this strategy and enhances our knowledge of bacterial carbohydrate catabolism.
未知功能域(DUF)家族在Pfam数据库(版本29.0)的16,295个家族中占3,892个。鉴于它们的生物重要性,需要大规模的策略来完成它们的功能分配。在这里,我们阐述了一种综合的“基因组酶学”策略,以识别DUF1537家族(PF07005)中的多种功能。我们将高通量配体筛选结果与序列相似性网络和基因组邻域网络的协同分析相结合,以确定DUF1537家族的成员是新颖的ATP依赖性四碳糖激酶。这项研究说明了这种策略的实用性,并增加了我们对细菌碳水化合物代谢的了解。