Ketohexose A ketose SUGAR with six carbon atoms, e.g. fructose.

一种六碳的酮。例。

Glucose cyclizes to form asix- membered pyranose ring whilst five –carbon surgars and six-carbon ketose sugars (ketohexoses) such as fructnose rings.

环状结构 四碳和更大的能环化，醛或酮与的另一碳原子上的羟反。

Transketolase is the key enzyme of pentose-phophate pathway, catalyses transfer of a two-carbon fragment from a ketolase (donor substance) to an aldose (acceptor substance).

转酮醇酶是磷酸戊途径的关键酶，催化二碳单元在酮（供体）和醛（受体）间的转移。