In the classic hypothesis there are two isoforms of COX, COX-1 and COX-2, which are very similar in their structure but are very different in their expression pattern and function within organisms.

一般认为COX有两种同工酶：COX - 1和COX - 2，二者在结构上非常相似，但是它们在机体中的表达方式及功能却完全不同。

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The new celebrity-chocked (Penelope Cruz, Courteney Cox Arquette, Lance Armstrong), teen-focused ads for Coke Classic are refreshing after a long spell of ho-hum advertising.

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