al·lo·ster·ic 
(ăl′ə-stĕrĭk)
(ăl′ə-stĕrĭk)adj.
Of or relating to the binding of a molecule to an enzyme at a site other than the active site, resulting in modulation of the enzyme's activity as a result of a change in its shape.
al′lo·steri·cal·ly adv.
al·loster·y (ə-lŏstə-rē) n.