| 释义 |
-ase
-asesuff. Enzyme: amylase.
[From diastase.]-ase suffix forming nouns indicating an enzyme: oxidase. [abstracted from diastase]ASE or A.S.E., American Stock Exchange. -ase a suffix used in the names of enzymes: oxidase. [extracted from diastase] -ase A suffix used to form the names of enzymes. It is often added to the name of the compound that the enzyme breaks down, as lactase, which breaks down lactose.EncyclopediaSeeASE-ase
-ase suffix used in forming the name of enzymes, affixed to a stem indicating the substrate (luciferase), the general nature of the substrate (endopeptidase, proteinase), or the type of reaction catalyzed (hydrolase).-ase (ās), A termination denoting an enzyme, suffixed to the name of the substance (substrate) on which the enzyme acts; for example, phosphatase, lipase, proteinase. May also indicate the reaction catalyzed, for example, decarboxylase, oxidase. Enzymes named before this naming convention was established generally have an -in ending; for example, pepsin, ptyalin, trypsin. [Fr. (diast)ase, an amylase that converts starch to maltose, fr. G. diastasis, separation, fr. dia-, through, apart, + stasis, a standing] -ase A suffix denoting an enzyme; attached to the end of the name of the substance (substrate) on which the enzyme acts; e.g., phosphatase, lipase, proteinase. May also indicate the reaction catalyzed, e.g., decarboxylase, oxidase. [Fr. (diast)ase, an amylase that converts starch to maltose, fr. G. diastasis, separation, fr. dia-, through, apart, + stasis, a standing]-ase Suffix denoting an enzyme. In most cases the suffix is added to a term for the substance acted upon or to the biochemical action promoted by the enzyme. Thus a lipase is an enzyme that acts on fats and a reverse transcriptase is an enzyme that promoted the transcription of DNA from RNA (which is the reverse of the usual direction). The suffix originated in the ending of the term diastase, a polysaccharide-splitting enzyme named in 1838. |