If an enzyme produces too much of one substance in the organism, that substance may act as an inhibitor for the enzyme at the beginning of the pathway that produces it, causing production of the substance to slow down or stop when there is sufficient amount.
Se un enzima produce unha determinada substancia en demasía, esa substancia poderá actuar como inhibidor do enzima, no inicio da vía que a produce, causando a redución ou parada da produción da substancia cando esta se acumula.