在搅拌下,将113g五氧化二磷溶于150g热磷酸中,静置,得到无水磷酸结晶(熔点42℃)。将此结晶温热到60℃,使其熔化成液体。取其1mL,加入4mL乙酐(二者摩尔比为1:1.7)。立即搅拌,通常温度会升至50~55℃,待形成均匀液体后使用。
合成制备方法在搅拌下,将113g五氧化二磷溶于150g热磷酸中,静置,得到无水磷酸结晶(熔点42℃)。将此结晶温热到60℃,使其熔化成液体。取其1mL,加入4mL乙酐(二者摩尔比为1:1.7)。立即搅拌,通常温度会升至50~55℃,待形成均匀液体后使用。
用途简介该试剂用于糖、酚类和肌醇等的乙酰化反应。
用途该试剂用于糖、酚类和肌醇等的乙酰化反应。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | Propionylphosphat | 6659-27-4 | C3H7O5P | 154.059 |
(乙酰氧基-羟基磷酰)乙酸酯 | diacetyl-phosphoric acid | 3614-36-6 | C4H7O6P | 182.07 |
Xylulose 5-phosphate/fructose 6-phosphate phosphoketolase (Xfp) is a key enzyme in the central carbohydrate metabolism in heterofermentative bacteria, in which enzymatic property of Xfps is well characterized. This is not the case in other microbes. The cyanobacterium Anabaena sp. PCC 7120 possesses three putative genes encoding Xfp, all1483, all2567, and alr1850. We purified three putative Xfps as recombinant proteins. The results of gel filtration indicated that these proteins form homomultimer complex. All1483 and All2567 showed phosphoketolase activity, whereas Alr1850 did not show the activity. Kinetic analyses demonstrated that substrates, fructose 6-phosphate and inorganic phosphate, are cooperatively bound to enzymes positively and negatively, respectively.