active centre

noun

biochem the region in an enzyme molecule in which the reactive groups that participate in its action are juxtaposed Also calledactive site

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An active centre of origin appears to exist in South-eastern Europe, from which the species radiate out in all directions.

There is an active centre of distribution in South-eastern Europe itself, from which species radiate out in all directions.

Wallingford, six miles above Streatley, is a very ancient town, and has been an active centre for the making of English history.

At Thebes, then, was the active centre of the influence that drew my friend away from modern things.

This active centre of the thoughts of a century, was sustained during the whole time by the storm of perpetual political conflict.

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